id	sid	tid	token	lemma	pos
cord-304487-ycvu5l5f	1	1	key	key	NN
cord-304487-ycvu5l5f	1	2	:	:	:
cord-304487-ycvu5l5f	2	1	cord-304487-ycvu5l5f	cord-304487-ycvu5l5f	NNP
cord-304487-ycvu5l5f	2	2	authors	author	NNS
cord-304487-ycvu5l5f	2	3	:	:	:
cord-304487-ycvu5l5f	2	4	Wertheim	Wertheim	NNP
cord-304487-ycvu5l5f	2	5	,	,	,
cord-304487-ycvu5l5f	2	6	Joel	Joel	NNP
cord-304487-ycvu5l5f	2	7	O	O	NNP
cord-304487-ycvu5l5f	3	1	title	title	NN
cord-304487-ycvu5l5f	3	2	:	:	:
cord-304487-ycvu5l5f	4	1	A	a	DT
cord-304487-ycvu5l5f	4	2	glimpse	glimpse	NN
cord-304487-ycvu5l5f	4	3	into	into	IN
cord-304487-ycvu5l5f	4	4	the	the	DT
cord-304487-ycvu5l5f	4	5	origins	origin	NNS
cord-304487-ycvu5l5f	4	6	of	of	IN
cord-304487-ycvu5l5f	4	7	genetic	genetic	JJ
cord-304487-ycvu5l5f	4	8	diversity	diversity	NN
cord-304487-ycvu5l5f	4	9	in	in	IN
cord-304487-ycvu5l5f	4	10	SARS	SARS	NNP
cord-304487-ycvu5l5f	4	11	-	-	HYPH
cord-304487-ycvu5l5f	4	12	CoV-2	CoV-2	NNP
cord-304487-ycvu5l5f	4	13	date	date	NN
cord-304487-ycvu5l5f	4	14	:	:	:
cord-304487-ycvu5l5f	4	15	2020	2020	CD
cord-304487-ycvu5l5f	4	16	-	-	HYPH
cord-304487-ycvu5l5f	4	17	03	03	CD
cord-304487-ycvu5l5f	4	18	-	-	HYPH
cord-304487-ycvu5l5f	4	19	04	04	CD
cord-304487-ycvu5l5f	4	20	journal	journal	NN
cord-304487-ycvu5l5f	4	21	:	:	:
cord-304487-ycvu5l5f	5	1	Clin	Clin	NNP
cord-304487-ycvu5l5f	5	2	Infect	infect	VB
cord-304487-ycvu5l5f	5	3	Dis	Dis	NNP
cord-304487-ycvu5l5f	5	4	DOI	doi	NN
cord-304487-ycvu5l5f	5	5	:	:	:
cord-304487-ycvu5l5f	6	1	10.1093	10.1093	CD
cord-304487-ycvu5l5f	6	2	/	/	SYM
cord-304487-ycvu5l5f	6	3	cid	cid	NN
cord-304487-ycvu5l5f	6	4	/	/	SYM
cord-304487-ycvu5l5f	6	5	ciaa213	ciaa213	NNP
cord-304487-ycvu5l5f	6	6	sha	sha	NNP
cord-304487-ycvu5l5f	6	7	:	:	:
cord-304487-ycvu5l5f	7	1	7a288871cdefc846dc86b9d565062ebaf0c2bb9c	7a288871cdefc846dc86b9d565062ebaf0c2bb9c	NNP
cord-304487-ycvu5l5f	7	2	doc_id	doc_id	NNP
cord-304487-ycvu5l5f	7	3	:	:	:
cord-304487-ycvu5l5f	7	4	304487	304487	CD
cord-304487-ycvu5l5f	7	5	cord_uid	cord_uid	NNS
cord-304487-ycvu5l5f	7	6	:	:	:
cord-304487-ycvu5l5f	8	1	ycvu5l5f	ycvu5l5f	NNP
cord-304487-ycvu5l5f	8	2	nan	nan	NNP
cord-304487-ycvu5l5f	9	1	A	a	DT
cord-304487-ycvu5l5f	9	2	deadly	deadly	JJ
cord-304487-ycvu5l5f	9	3	pathogen	pathogen	NN
cord-304487-ycvu5l5f	9	4	has	have	VBZ
cord-304487-ycvu5l5f	9	5	found	find	VBN
cord-304487-ycvu5l5f	9	6	a	a	DT
cord-304487-ycvu5l5f	9	7	new	new	JJ
cord-304487-ycvu5l5f	9	8	host	host	NN
cord-304487-ycvu5l5f	9	9	.	.	.
cord-304487-ycvu5l5f	10	1	Near	near	IN
cord-304487-ycvu5l5f	10	2	the	the	DT
cord-304487-ycvu5l5f	10	3	end	end	NN
cord-304487-ycvu5l5f	10	4	of	of	IN
cord-304487-ycvu5l5f	10	5	2019	2019	CD
cord-304487-ycvu5l5f	10	6	,	,	,
cord-304487-ycvu5l5f	10	7	the	the	DT
cord-304487-ycvu5l5f	10	8	novel	novel	JJ
cord-304487-ycvu5l5f	10	9	coronavirus	coronavirus	NN
cord-304487-ycvu5l5f	10	10	SARS	SARS	NNP
cord-304487-ycvu5l5f	10	11	-	-	HYPH
cord-304487-ycvu5l5f	10	12	CoV-2	CoV-2	NNP
cord-304487-ycvu5l5f	10	13	began	begin	VBD
cord-304487-ycvu5l5f	10	14	transmitting	transmit	VBG
cord-304487-ycvu5l5f	10	15	among	among	IN
cord-304487-ycvu5l5f	10	16	humans	human	NNS
cord-304487-ycvu5l5f	10	17	.	.	.
cord-304487-ycvu5l5f	11	1	In	in	IN
cord-304487-ycvu5l5f	11	2	the	the	DT
cord-304487-ycvu5l5f	11	3	first	first	JJ
cord-304487-ycvu5l5f	11	4	two	two	CD
cord-304487-ycvu5l5f	11	5	months	month	NNS
cord-304487-ycvu5l5f	11	6	following	follow	VBG
cord-304487-ycvu5l5f	11	7	its	-PRON-	PRP$
cord-304487-ycvu5l5f	11	8	discovery	discovery	NN
cord-304487-ycvu5l5f	11	9	,	,	,
cord-304487-ycvu5l5f	11	10	over	over	IN
cord-304487-ycvu5l5f	11	11	75,000	75,000	CD
cord-304487-ycvu5l5f	11	12	cases	case	NNS
cord-304487-ycvu5l5f	11	13	of	of	IN
cord-304487-ycvu5l5f	11	14	COVID-19	covid-19	JJ
cord-304487-ycvu5l5f	11	15	causing	cause	VBG
cord-304487-ycvu5l5f	11	16	over	over	IN
cord-304487-ycvu5l5f	11	17	2,000	2,000	CD
cord-304487-ycvu5l5f	11	18	deaths	death	NNS
cord-304487-ycvu5l5f	11	19	have	have	VBP
cord-304487-ycvu5l5f	11	20	been	be	VBN
cord-304487-ycvu5l5f	11	21	confirmed	confirm	VBN
cord-304487-ycvu5l5f	11	22	.	.	.
cord-304487-ycvu5l5f	12	1	Researchers	researcher	NNS
cord-304487-ycvu5l5f	12	2	rapidly	rapidly	RB
cord-304487-ycvu5l5f	12	3	characterized	characterize	VBD
cord-304487-ycvu5l5f	12	4	the	the	DT
cord-304487-ycvu5l5f	12	5	viral	viral	JJ
cord-304487-ycvu5l5f	12	6	genome	genome	NN
cord-304487-ycvu5l5f	12	7	[	[	-LRB-
cord-304487-ycvu5l5f	12	8	1	1	CD
cord-304487-ycvu5l5f	12	9	]	]	-RRB-
cord-304487-ycvu5l5f	12	10	and	and	CC
cord-304487-ycvu5l5f	12	11	have	have	VBP
cord-304487-ycvu5l5f	12	12	already	already	RB
cord-304487-ycvu5l5f	12	13	identified	identify	VBN
cord-304487-ycvu5l5f	12	14	a	a	DT
cord-304487-ycvu5l5f	12	15	closely	closely	RB
cord-304487-ycvu5l5f	12	16	related	related	JJ
cord-304487-ycvu5l5f	12	17	virus	virus	NN
cord-304487-ycvu5l5f	12	18	in	in	IN
cord-304487-ycvu5l5f	12	19	bats	bat	NNS
cord-304487-ycvu5l5f	12	20	[	[	-LRB-
cord-304487-ycvu5l5f	12	21	2	2	CD
cord-304487-ycvu5l5f	12	22	]	]	-RRB-
cord-304487-ycvu5l5f	12	23	,	,	,
cord-304487-ycvu5l5f	12	24	pointing	point	VBG
cord-304487-ycvu5l5f	12	25	to	to	IN
cord-304487-ycvu5l5f	12	26	these	these	DT
cord-304487-ycvu5l5f	12	27	animals	animal	NNS
cord-304487-ycvu5l5f	12	28	as	as	IN
cord-304487-ycvu5l5f	12	29	the	the	DT
cord-304487-ycvu5l5f	12	30	likely	likely	JJ
cord-304487-ycvu5l5f	12	31	natural	natural	JJ
cord-304487-ycvu5l5f	12	32	reservoir	reservoir	NN
cord-304487-ycvu5l5f	12	33	of	of	IN
cord-304487-ycvu5l5f	12	34	this	this	DT
cord-304487-ycvu5l5f	12	35	virus	virus	NN
cord-304487-ycvu5l5f	12	36	.	.	.
cord-304487-ycvu5l5f	13	1	The	the	DT
cord-304487-ycvu5l5f	13	2	search	search	NN
cord-304487-ycvu5l5f	13	3	continues	continue	VBZ
cord-304487-ycvu5l5f	13	4	for	for	IN
cord-304487-ycvu5l5f	13	5	an	an	DT
cord-304487-ycvu5l5f	13	6	intermediate	intermediate	JJ
cord-304487-ycvu5l5f	13	7	host	host	NN
cord-304487-ycvu5l5f	13	8	animal	animal	NN
cord-304487-ycvu5l5f	13	9	that	that	WDT
cord-304487-ycvu5l5f	13	10	may	may	MD
cord-304487-ycvu5l5f	13	11	have	have	VB
cord-304487-ycvu5l5f	13	12	facilitated	facilitate	VBN
cord-304487-ycvu5l5f	13	13	the	the	DT
cord-304487-ycvu5l5f	13	14	zoonosis	zoonosis	NN
cord-304487-ycvu5l5f	13	15	,	,	,
cord-304487-ycvu5l5f	13	16	like	like	IN
cord-304487-ycvu5l5f	13	17	camels	camel	NNS
cord-304487-ycvu5l5f	13	18	do	do	VBP
cord-304487-ycvu5l5f	13	19	for	for	IN
cord-304487-ycvu5l5f	13	20	MERS	MERS	NNP
cord-304487-ycvu5l5f	13	21	-	-	HYPH
cord-304487-ycvu5l5f	13	22	CoV	CoV	NNP
cord-304487-ycvu5l5f	13	23	and	and	CC
cord-304487-ycvu5l5f	13	24	palm	palm	NN
cord-304487-ycvu5l5f	13	25	civets	civet	NNS
cord-304487-ycvu5l5f	13	26	did	do	VBD
cord-304487-ycvu5l5f	13	27	for	for	IN
cord-304487-ycvu5l5f	13	28	SARS	SARS	NNP
cord-304487-ycvu5l5f	13	29	-	-	HYPH
cord-304487-ycvu5l5f	13	30	CoV.	CoV.	NNP
cord-304487-ycvu5l5f	14	1	From	from	IN
cord-304487-ycvu5l5f	14	2	a	a	DT
cord-304487-ycvu5l5f	14	3	clinical	clinical	JJ
cord-304487-ycvu5l5f	14	4	and	and	CC
cord-304487-ycvu5l5f	14	5	epidemiological	epidemiological	JJ
cord-304487-ycvu5l5f	14	6	perspective	perspective	NN
cord-304487-ycvu5l5f	14	7	,	,	,
cord-304487-ycvu5l5f	14	8	there	there	EX
cord-304487-ycvu5l5f	14	9	is	be	VBZ
cord-304487-ycvu5l5f	14	10	obvious	obvious	JJ
cord-304487-ycvu5l5f	14	11	interest	interest	NN
cord-304487-ycvu5l5f	14	12	in	in	IN
cord-304487-ycvu5l5f	14	13	whether	whether	IN
cord-304487-ycvu5l5f	14	14	SARS	SARS	NNP
cord-304487-ycvu5l5f	14	15	-	-	HYPH
cord-304487-ycvu5l5f	14	16	CoV-2	CoV-2	NNP
cord-304487-ycvu5l5f	14	17	will	will	MD
cord-304487-ycvu5l5f	14	18	adapt	adapt	VB
cord-304487-ycvu5l5f	14	19	to	to	TO
cord-304487-ycvu5l5f	14	20	become	become	VB
cord-304487-ycvu5l5f	14	21	more	more	RBR
cord-304487-ycvu5l5f	14	22	transmissible	transmissible	JJ
cord-304487-ycvu5l5f	14	23	and/or	and/or	CC
cord-304487-ycvu5l5f	14	24	virulent	virulent	JJ
cord-304487-ycvu5l5f	14	25	in	in	IN
cord-304487-ycvu5l5f	14	26	humans	human	NNS
cord-304487-ycvu5l5f	14	27	.	.	.
cord-304487-ycvu5l5f	15	1	Before	before	IN
cord-304487-ycvu5l5f	15	2	we	-PRON-	PRP
cord-304487-ycvu5l5f	15	3	can	can	MD
cord-304487-ycvu5l5f	15	4	address	address	VB
cord-304487-ycvu5l5f	15	5	this	this	DT
cord-304487-ycvu5l5f	15	6	question	question	NN
cord-304487-ycvu5l5f	15	7	,	,	,
cord-304487-ycvu5l5f	15	8	it	-PRON-	PRP
cord-304487-ycvu5l5f	15	9	is	be	VBZ
cord-304487-ycvu5l5f	15	10	importantly	importantly	RB
cord-304487-ycvu5l5f	15	11	to	to	TO
cord-304487-ycvu5l5f	15	12	realize	realize	VB
cord-304487-ycvu5l5f	15	13	that	that	IN
cord-304487-ycvu5l5f	15	14	most	most	JJS
cord-304487-ycvu5l5f	15	15	evolutionary	evolutionary	JJ
cord-304487-ycvu5l5f	15	16	options	option	NNS
cord-304487-ycvu5l5f	15	17	available	available	JJ
cord-304487-ycvu5l5f	15	18	to	to	IN
cord-304487-ycvu5l5f	15	19	this	this	DT
cord-304487-ycvu5l5f	15	20	virus	virus	NN
cord-304487-ycvu5l5f	15	21	have	have	VBP
cord-304487-ycvu5l5f	15	22	already	already	RB
cord-304487-ycvu5l5f	15	23	been	be	VBN
cord-304487-ycvu5l5f	15	24	explored	explore	VBN
cord-304487-ycvu5l5f	15	25	in	in	IN
cord-304487-ycvu5l5f	15	26	bats	bat	NNS
cord-304487-ycvu5l5f	15	27	,	,	,
cord-304487-ycvu5l5f	15	28	where	where	WRB
cord-304487-ycvu5l5f	15	29	there	there	EX
cord-304487-ycvu5l5f	15	30	is	be	VBZ
cord-304487-ycvu5l5f	15	31	an	an	DT
cord-304487-ycvu5l5f	15	32	immense	immense	JJ
cord-304487-ycvu5l5f	15	33	array	array	NN
cord-304487-ycvu5l5f	15	34	of	of	IN
cord-304487-ycvu5l5f	15	35	genetically	genetically	RB
cord-304487-ycvu5l5f	15	36	distinct	distinct	JJ
cord-304487-ycvu5l5f	15	37	coronaviruses	coronaviruse	NNS
cord-304487-ycvu5l5f	15	38	.	.	.
cord-304487-ycvu5l5f	16	1	Viruses	virus	NNS
cord-304487-ycvu5l5f	16	2	in	in	IN
cord-304487-ycvu5l5f	16	3	the	the	DT
cord-304487-ycvu5l5f	16	4	betacoronavirus	betacoronavirus	NN
cord-304487-ycvu5l5f	16	5	genus	genus	NN
cord-304487-ycvu5l5f	16	6	,	,	,
cord-304487-ycvu5l5f	16	7	to	to	TO
cord-304487-ycvu5l5f	16	8	which	which	WDT
cord-304487-ycvu5l5f	16	9	SARS	SARS	NNP
cord-304487-ycvu5l5f	16	10	-	-	HYPH
cord-304487-ycvu5l5f	16	11	CoV-2	CoV-2	NNP
cord-304487-ycvu5l5f	16	12	belongs	belong	VBZ
cord-304487-ycvu5l5f	16	13	,	,	,
cord-304487-ycvu5l5f	16	14	have	have	VBP
cord-304487-ycvu5l5f	16	15	likely	likely	RB
cord-304487-ycvu5l5f	16	16	been	be	VBN
cord-304487-ycvu5l5f	16	17	infecting	infect	VBG
cord-304487-ycvu5l5f	16	18	bats	bat	NNS
cord-304487-ycvu5l5f	16	19	for	for	IN
cord-304487-ycvu5l5f	16	20	tens	ten	NNS
cord-304487-ycvu5l5f	16	21	of	of	IN
cord-304487-ycvu5l5f	16	22	millions	million	NNS
cord-304487-ycvu5l5f	16	23	of	of	IN
cord-304487-ycvu5l5f	16	24	years	year	NNS
cord-304487-ycvu5l5f	16	25	,	,	,
cord-304487-ycvu5l5f	16	26	possibly	possibly	RB
cord-304487-ycvu5l5f	16	27	since	since	IN
cord-304487-ycvu5l5f	16	28	the	the	DT
cord-304487-ycvu5l5f	16	29	origin	origin	NN
cord-304487-ycvu5l5f	16	30	of	of	IN
cord-304487-ycvu5l5f	16	31	bats	bat	NNS
cord-304487-ycvu5l5f	16	32	themselves	-PRON-	PRP
cord-304487-ycvu5l5f	16	33	[	[	-LRB-
cord-304487-ycvu5l5f	16	34	3	3	CD
cord-304487-ycvu5l5f	16	35	]	]	-RRB-
cord-304487-ycvu5l5f	16	36	.	.	.
cord-304487-ycvu5l5f	17	1	Within	within	IN
cord-304487-ycvu5l5f	17	2	this	this	DT
cord-304487-ycvu5l5f	17	3	natural	natural	JJ
cord-304487-ycvu5l5f	17	4	reservoir	reservoir	NN
cord-304487-ycvu5l5f	17	5	,	,	,
cord-304487-ycvu5l5f	17	6	viruses	virus	NNS
cord-304487-ycvu5l5f	17	7	exist	exist	VBP
cord-304487-ycvu5l5f	17	8	that	that	WDT
cord-304487-ycvu5l5f	17	9	would	would	MD
cord-304487-ycvu5l5f	17	10	cause	cause	VB
cord-304487-ycvu5l5f	17	11	high	high	JJ
cord-304487-ycvu5l5f	17	12	and	and	CC
cord-304487-ycvu5l5f	17	13	low	low	JJ
cord-304487-ycvu5l5f	17	14	virulence	virulence	NN
cord-304487-ycvu5l5f	17	15	in	in	IN
cord-304487-ycvu5l5f	17	16	humans	human	NNS
cord-304487-ycvu5l5f	17	17	,	,	,
cord-304487-ycvu5l5f	17	18	as	as	RB
cord-304487-ycvu5l5f	17	19	well	well	RB
cord-304487-ycvu5l5f	17	20	as	as	IN
cord-304487-ycvu5l5f	17	21	those	those	DT
cord-304487-ycvu5l5f	17	22	viruses	virus	NNS
cord-304487-ycvu5l5f	17	23	that	that	WDT
cord-304487-ycvu5l5f	17	24	are	be	VBP
cord-304487-ycvu5l5f	17	25	easily	easily	RB
cord-304487-ycvu5l5f	17	26	transmissible	transmissible	JJ
cord-304487-ycvu5l5f	17	27	from	from	IN
cord-304487-ycvu5l5f	17	28	human	human	JJ
cord-304487-ycvu5l5f	17	29	to	to	IN
cord-304487-ycvu5l5f	17	30	human	human	NN
cord-304487-ycvu5l5f	17	31	.	.	.
cord-304487-ycvu5l5f	18	1	Evolution	evolution	NN
cord-304487-ycvu5l5f	18	2	tinkers	tinker	NNS
cord-304487-ycvu5l5f	18	3	with	with	IN
cord-304487-ycvu5l5f	18	4	these	these	DT
cord-304487-ycvu5l5f	18	5	viruses	virus	NNS
cord-304487-ycvu5l5f	18	6	in	in	IN
cord-304487-ycvu5l5f	18	7	bats	bat	NNS
cord-304487-ycvu5l5f	18	8	,	,	,
cord-304487-ycvu5l5f	18	9	and	and	CC
cord-304487-ycvu5l5f	18	10	the	the	DT
cord-304487-ycvu5l5f	18	11	epidemiological	epidemiological	JJ
cord-304487-ycvu5l5f	18	12	consequences	consequence	NNS
cord-304487-ycvu5l5f	18	13	are	be	VBP
cord-304487-ycvu5l5f	18	14	seen	see	VBN
cord-304487-ycvu5l5f	18	15	both	both	CC
cord-304487-ycvu5l5f	18	16	in	in	IN
cord-304487-ycvu5l5f	18	17	pathogenic	pathogenic	JJ
cord-304487-ycvu5l5f	18	18	zoonotic	zoonotic	JJ
cord-304487-ycvu5l5f	18	19	diseases	disease	NNS
cord-304487-ycvu5l5f	18	20	(	(	-LRB-
cord-304487-ycvu5l5f	18	21	e.g.	e.g.	RB
cord-304487-ycvu5l5f	18	22	,	,	,
cord-304487-ycvu5l5f	18	23	SARS	SARS	NNP
cord-304487-ycvu5l5f	18	24	,	,	,
cord-304487-ycvu5l5f	18	25	MERS	MERS	NNP
cord-304487-ycvu5l5f	18	26	,	,	,
cord-304487-ycvu5l5f	18	27	and	and	CC
cord-304487-ycvu5l5f	18	28	COVID-19	COVID-19	NNP
cord-304487-ycvu5l5f	18	29	)	)	-RRB-
cord-304487-ycvu5l5f	18	30	and	and	CC
cord-304487-ycvu5l5f	18	31	in	in	IN
cord-304487-ycvu5l5f	18	32	the	the	DT
cord-304487-ycvu5l5f	18	33	less	less	RBR
cord-304487-ycvu5l5f	18	34	-	-	HYPH
cord-304487-ycvu5l5f	18	35	virulent	virulent	JJ
cord-304487-ycvu5l5f	18	36	circulating	circulate	VBG
cord-304487-ycvu5l5f	18	37	coronaviruses	coronaviruse	NNS
cord-304487-ycvu5l5f	18	38	causing	cause	VBG
cord-304487-ycvu5l5f	18	39	common	common	JJ
cord-304487-ycvu5l5f	18	40	colds	cold	NNS
cord-304487-ycvu5l5f	18	41	.	.	.
cord-304487-ycvu5l5f	19	1	Occasionally	occasionally	RB
cord-304487-ycvu5l5f	19	2	,	,	,
cord-304487-ycvu5l5f	19	3	however	however	RB
cord-304487-ycvu5l5f	19	4	,	,	,
cord-304487-ycvu5l5f	19	5	some	some	DT
cord-304487-ycvu5l5f	19	6	evolutionary	evolutionary	JJ
cord-304487-ycvu5l5f	19	7	avenues	avenue	NNS
cord-304487-ycvu5l5f	19	8	are	be	VBP
cord-304487-ycvu5l5f	19	9	not	not	RB
cord-304487-ycvu5l5f	19	10	available	available	JJ
cord-304487-ycvu5l5f	19	11	to	to	IN
cord-304487-ycvu5l5f	19	12	a	a	DT
cord-304487-ycvu5l5f	19	13	zoonotic	zoonotic	JJ
cord-304487-ycvu5l5f	19	14	pathogen	pathogen	NN
cord-304487-ycvu5l5f	19	15	until	until	IN
cord-304487-ycvu5l5f	19	16	after	after	IN
cord-304487-ycvu5l5f	19	17	arrival	arrival	NN
cord-304487-ycvu5l5f	19	18	in	in	IN
cord-304487-ycvu5l5f	19	19	humans	human	NNS
cord-304487-ycvu5l5f	19	20	[	[	-LRB-
cord-304487-ycvu5l5f	19	21	4	4	CD
cord-304487-ycvu5l5f	19	22	]	]	-RRB-
cord-304487-ycvu5l5f	19	23	.	.	.
cord-304487-ycvu5l5f	20	1	Evolution	evolution	NN
cord-304487-ycvu5l5f	20	2	requires	require	VBZ
cord-304487-ycvu5l5f	20	3	genetic	genetic	JJ
cord-304487-ycvu5l5f	20	4	diversity	diversity	NN
cord-304487-ycvu5l5f	20	5	,	,	,
cord-304487-ycvu5l5f	20	6	and	and	CC
cord-304487-ycvu5l5f	20	7	genetic	genetic	JJ
cord-304487-ycvu5l5f	20	8	diversity	diversity	NN
cord-304487-ycvu5l5f	20	9	arises	arise	VBZ
cord-304487-ycvu5l5f	20	10	from	from	IN
cord-304487-ycvu5l5f	20	11	two	two	CD
cord-304487-ycvu5l5f	20	12	distinct	distinct	JJ
cord-304487-ycvu5l5f	20	13	mechanisms	mechanism	NNS
cord-304487-ycvu5l5f	20	14	:	:	:
cord-304487-ycvu5l5f	20	15	mutation	mutation	NN
cord-304487-ycvu5l5f	20	16	and	and	CC
cord-304487-ycvu5l5f	20	17	recombination	recombination	NN
cord-304487-ycvu5l5f	20	18	.	.	.
cord-304487-ycvu5l5f	21	1	Mutation	mutation	NN
cord-304487-ycvu5l5f	21	2	is	be	VBZ
cord-304487-ycvu5l5f	21	3	the	the	DT
cord-304487-ycvu5l5f	21	4	replacement	replacement	NN
cord-304487-ycvu5l5f	21	5	of	of	IN
cord-304487-ycvu5l5f	21	6	one	one	CD
cord-304487-ycvu5l5f	21	7	nucleotide	nucleotide	JJ
cord-304487-ycvu5l5f	21	8	base	base	NN
cord-304487-ycvu5l5f	21	9	with	with	IN
cord-304487-ycvu5l5f	21	10	another	another	DT
cord-304487-ycvu5l5f	21	11	,	,	,
cord-304487-ycvu5l5f	21	12	or	or	CC
cord-304487-ycvu5l5f	21	13	the	the	DT
cord-304487-ycvu5l5f	21	14	addition	addition	NN
cord-304487-ycvu5l5f	21	15	/	/	SYM
cord-304487-ycvu5l5f	21	16	removal	removal	NN
cord-304487-ycvu5l5f	21	17	of	of	IN
cord-304487-ycvu5l5f	21	18	nucleotide(s	nucleotide(s	NNP
cord-304487-ycvu5l5f	21	19	)	)	-RRB-
cord-304487-ycvu5l5f	21	20	.	.	.
cord-304487-ycvu5l5f	22	1	Mutations	mutation	NNS
cord-304487-ycvu5l5f	22	2	are	be	VBP
cord-304487-ycvu5l5f	22	3	the	the	DT
cord-304487-ycvu5l5f	22	4	only	only	JJ
cord-304487-ycvu5l5f	22	5	true	true	JJ
cord-304487-ycvu5l5f	22	6	source	source	NN
cord-304487-ycvu5l5f	22	7	of	of	IN
cord-304487-ycvu5l5f	22	8	genetic	genetic	JJ
cord-304487-ycvu5l5f	22	9	novelty	novelty	NN
cord-304487-ycvu5l5f	22	10	.	.	.
cord-304487-ycvu5l5f	23	1	Recombination	recombination	NN
cord-304487-ycvu5l5f	23	2	,	,	,
cord-304487-ycvu5l5f	23	3	on	on	IN
cord-304487-ycvu5l5f	23	4	the	the	DT
cord-304487-ycvu5l5f	23	5	other	other	JJ
cord-304487-ycvu5l5f	23	6	hand	hand	NN
cord-304487-ycvu5l5f	23	7	,	,	,
cord-304487-ycvu5l5f	23	8	can	can	MD
cord-304487-ycvu5l5f	23	9	increase	increase	VB
cord-304487-ycvu5l5f	23	10	genetic	genetic	JJ
cord-304487-ycvu5l5f	23	11	diversity	diversity	NN
cord-304487-ycvu5l5f	23	12	by	by	IN
cord-304487-ycvu5l5f	23	13	placing	place	VBG
cord-304487-ycvu5l5f	23	14	existing	exist	VBG
cord-304487-ycvu5l5f	23	15	mutations	mutation	NNS
cord-304487-ycvu5l5f	23	16	into	into	IN
cord-304487-ycvu5l5f	23	17	new	new	JJ
cord-304487-ycvu5l5f	23	18	genetic	genetic	JJ
cord-304487-ycvu5l5f	23	19	backgrounds	background	NNS
cord-304487-ycvu5l5f	23	20	.	.	.
cord-304487-ycvu5l5f	24	1	Two	two	CD
cord-304487-ycvu5l5f	24	2	articles	article	NNS
cord-304487-ycvu5l5f	24	3	in	in	IN
cord-304487-ycvu5l5f	24	4	the	the	DT
cord-304487-ycvu5l5f	24	5	most	most	RBS
cord-304487-ycvu5l5f	24	6	recent	recent	JJ
cord-304487-ycvu5l5f	24	7	issue	issue	NN
cord-304487-ycvu5l5f	24	8	of	of	IN
cord-304487-ycvu5l5f	24	9	Clinical	Clinical	NNP
cord-304487-ycvu5l5f	24	10	Infectious	Infectious	NNP
cord-304487-ycvu5l5f	24	11	Diseases	Diseases	NNPS
cord-304487-ycvu5l5f	24	12	explore	explore	VBP
cord-304487-ycvu5l5f	24	13	these	these	DT
cord-304487-ycvu5l5f	24	14	sources	source	NNS
cord-304487-ycvu5l5f	24	15	of	of	IN
cord-304487-ycvu5l5f	24	16	genetic	genetic	JJ
cord-304487-ycvu5l5f	24	17	variation	variation	NN
cord-304487-ycvu5l5f	24	18	in	in	IN
cord-304487-ycvu5l5f	24	19	SARS	SARS	NNP
cord-304487-ycvu5l5f	24	20	-	-	HYPH
cord-304487-ycvu5l5f	24	21	CoV-2	CoV-2	NNP
cord-304487-ycvu5l5f	24	22	.	.	.
cord-304487-ycvu5l5f	25	1	Li	Li	NNP
cord-304487-ycvu5l5f	25	2	and	and	CC
cord-304487-ycvu5l5f	25	3	colleagues	colleague	NNS
cord-304487-ycvu5l5f	25	4	describe	describe	VBP
cord-304487-ycvu5l5f	25	5	the	the	DT
cord-304487-ycvu5l5f	25	6	genetic	genetic	JJ
cord-304487-ycvu5l5f	25	7	variability	variability	NN
cord-304487-ycvu5l5f	25	8	within	within	IN
cord-304487-ycvu5l5f	25	9	7	7	CD
cord-304487-ycvu5l5f	26	1	COVID-19	covid-19	JJ
cord-304487-ycvu5l5f	26	2	patients	patient	NNS
cord-304487-ycvu5l5f	26	3	from	from	IN
cord-304487-ycvu5l5f	26	4	China	China	NNP
cord-304487-ycvu5l5f	26	5	.	.	.
cord-304487-ycvu5l5f	27	1	Yi	Yi	NNP
cord-304487-ycvu5l5f	27	2	explores	explore	VBZ
cord-304487-ycvu5l5f	27	3	potential	potential	JJ
cord-304487-ycvu5l5f	27	4	instances	instance	NNS
cord-304487-ycvu5l5f	27	5	of	of	IN
cord-304487-ycvu5l5f	27	6	recombination	recombination	NN
cord-304487-ycvu5l5f	27	7	among	among	IN
cord-304487-ycvu5l5f	27	8	84	84	CD
cord-304487-ycvu5l5f	27	9	SARS	SARS	NNP
cord-304487-ycvu5l5f	27	10	-	-	HYPH
cord-304487-ycvu5l5f	27	11	CoV-2	CoV-2	NNP
cord-304487-ycvu5l5f	27	12	genomes	genome	NNS
cord-304487-ycvu5l5f	27	13	from	from	IN
cord-304487-ycvu5l5f	27	14	multiple	multiple	JJ
cord-304487-ycvu5l5f	27	15	countries	country	NNS
cord-304487-ycvu5l5f	27	16	.	.	.
cord-304487-ycvu5l5f	28	1	Molecular	molecular	JJ
cord-304487-ycvu5l5f	28	2	epidemiology	epidemiology	NN
cord-304487-ycvu5l5f	28	3	can	can	MD
cord-304487-ycvu5l5f	28	4	use	use	VB
cord-304487-ycvu5l5f	28	5	the	the	DT
cord-304487-ycvu5l5f	28	6	genetic	genetic	JJ
cord-304487-ycvu5l5f	28	7	variation	variation	NN
cord-304487-ycvu5l5f	28	8	of	of	IN
cord-304487-ycvu5l5f	28	9	SARS	SARS	NNP
cord-304487-ycvu5l5f	28	10	-	-	HYPH
cord-304487-ycvu5l5f	28	11	CoV-2	CoV-2	NNP
cord-304487-ycvu5l5f	28	12	to	to	TO
cord-304487-ycvu5l5f	28	13	trace	trace	VB
cord-304487-ycvu5l5f	28	14	its	-PRON-	PRP$
cord-304487-ycvu5l5f	28	15	history	history	NN
cord-304487-ycvu5l5f	28	16	and	and	CC
cord-304487-ycvu5l5f	28	17	better	well	RBR
cord-304487-ycvu5l5f	28	18	understand	understand	VB
cord-304487-ycvu5l5f	28	19	clusters	cluster	NNS
cord-304487-ycvu5l5f	28	20	of	of	IN
cord-304487-ycvu5l5f	28	21	transmission	transmission	NN
cord-304487-ycvu5l5f	28	22	.	.	.
cord-304487-ycvu5l5f	29	1	When	when	WRB
cord-304487-ycvu5l5f	29	2	we	-PRON-	PRP
cord-304487-ycvu5l5f	29	3	examine	examine	VBP
cord-304487-ycvu5l5f	29	4	viruses	virus	NNS
cord-304487-ycvu5l5f	29	5	infecting	infect	VBG
cord-304487-ycvu5l5f	29	6	two	two	CD
cord-304487-ycvu5l5f	29	7	different	different	JJ
cord-304487-ycvu5l5f	29	8	people	people	NNS
cord-304487-ycvu5l5f	29	9	,	,	,
cord-304487-ycvu5l5f	29	10	the	the	DT
cord-304487-ycvu5l5f	29	11	amount	amount	NN
cord-304487-ycvu5l5f	29	12	of	of	IN
cord-304487-ycvu5l5f	29	13	genetic	genetic	JJ
cord-304487-ycvu5l5f	29	14	similarity	similarity	NN
cord-304487-ycvu5l5f	29	15	between	between	IN
cord-304487-ycvu5l5f	29	16	these	these	DT
cord-304487-ycvu5l5f	29	17	viruses	virus	NNS
cord-304487-ycvu5l5f	29	18	is	be	VBZ
cord-304487-ycvu5l5f	29	19	a	a	DT
cord-304487-ycvu5l5f	29	20	proxy	proxy	NN
cord-304487-ycvu5l5f	29	21	for	for	IN
cord-304487-ycvu5l5f	29	22	the	the	DT
cord-304487-ycvu5l5f	29	23	directness	directness	NN
cord-304487-ycvu5l5f	29	24	of	of	IN
cord-304487-ycvu5l5f	29	25	their	-PRON-	PRP$
cord-304487-ycvu5l5f	29	26	epidemiological	epidemiological	JJ
cord-304487-ycvu5l5f	29	27	relationship	relationship	NN
cord-304487-ycvu5l5f	29	28	.	.	.
cord-304487-ycvu5l5f	30	1	Direct	direct	JJ
cord-304487-ycvu5l5f	30	2	transmission	transmission	NN
cord-304487-ycvu5l5f	30	3	partners	partner	NNS
cord-304487-ycvu5l5f	30	4	are	be	VBP
cord-304487-ycvu5l5f	30	5	more	more	RBR
cord-304487-ycvu5l5f	30	6	likely	likely	JJ
cord-304487-ycvu5l5f	30	7	to	to	TO
cord-304487-ycvu5l5f	30	8	have	have	VB
cord-304487-ycvu5l5f	30	9	identical	identical	JJ
cord-304487-ycvu5l5f	30	10	or	or	CC
cord-304487-ycvu5l5f	30	11	nearly	nearly	RB
cord-304487-ycvu5l5f	30	12	identical	identical	JJ
cord-304487-ycvu5l5f	30	13	sequences	sequence	NNS
cord-304487-ycvu5l5f	30	14	.	.	.
cord-304487-ycvu5l5f	31	1	Bear	bear	VB
cord-304487-ycvu5l5f	31	2	in	in	IN
cord-304487-ycvu5l5f	31	3	mind	mind	NN
cord-304487-ycvu5l5f	31	4	that	that	IN
cord-304487-ycvu5l5f	31	5	the	the	DT
cord-304487-ycvu5l5f	31	6	genetic	genetic	JJ
cord-304487-ycvu5l5f	31	7	differences	difference	NNS
cord-304487-ycvu5l5f	31	8	separating	separate	VBG
cord-304487-ycvu5l5f	31	9	these	these	DT
cord-304487-ycvu5l5f	31	10	viruses	virus	NNS
cord-304487-ycvu5l5f	31	11	did	do	VBD
cord-304487-ycvu5l5f	31	12	not	not	RB
cord-304487-ycvu5l5f	31	13	arise	arise	VB
cord-304487-ycvu5l5f	31	14	between	between	IN
cord-304487-ycvu5l5f	31	15	these	these	DT
cord-304487-ycvu5l5f	31	16	individuals	individual	NNS
cord-304487-ycvu5l5f	32	1	;	;	:
cord-304487-ycvu5l5f	32	2	rather	rather	RB
cord-304487-ycvu5l5f	32	3	,	,	,
cord-304487-ycvu5l5f	32	4	all	all	DT
cord-304487-ycvu5l5f	32	5	mutations	mutation	NNS
cord-304487-ycvu5l5f	32	6	arise	arise	VBP
cord-304487-ycvu5l5f	32	7	during	during	IN
cord-304487-ycvu5l5f	32	8	intra	intra	JJ
cord-304487-ycvu5l5f	32	9	-	-	JJ
cord-304487-ycvu5l5f	32	10	host	host	JJ
cord-304487-ycvu5l5f	32	11	replication	replication	NN
cord-304487-ycvu5l5f	32	12	.	.	.
cord-304487-ycvu5l5f	33	1	In	in	IN
cord-304487-ycvu5l5f	33	2	this	this	DT
cord-304487-ycvu5l5f	33	3	issue	issue	NN
cord-304487-ycvu5l5f	33	4	,	,	,
cord-304487-ycvu5l5f	33	5	Li	Li	NNP
cord-304487-ycvu5l5f	33	6	and	and	CC
cord-304487-ycvu5l5f	33	7	colleagues	colleague	NNS
cord-304487-ycvu5l5f	33	8	reveal	reveal	VBP
cord-304487-ycvu5l5f	33	9	the	the	DT
cord-304487-ycvu5l5f	33	10	intra	intra	JJ
cord-304487-ycvu5l5f	33	11	-	-	JJ
cord-304487-ycvu5l5f	33	12	host	host	JJ
cord-304487-ycvu5l5f	33	13	genetic	genetic	JJ
cord-304487-ycvu5l5f	33	14	variation	variation	NN
cord-304487-ycvu5l5f	33	15	of	of	IN
cord-304487-ycvu5l5f	33	16	SARS	SARS	NNP
cord-304487-ycvu5l5f	33	17	-	-	HYPH
cord-304487-ycvu5l5f	33	18	CoV-2	CoV-2	NNP
cord-304487-ycvu5l5f	33	19	.	.	.
cord-304487-ycvu5l5f	34	1	When	when	WRB
cord-304487-ycvu5l5f	34	2	these	these	DT
cord-304487-ycvu5l5f	34	3	researchers	researcher	NNS
cord-304487-ycvu5l5f	34	4	examined	examine	VBD
cord-304487-ycvu5l5f	34	5	genomes	genome	NNS
cord-304487-ycvu5l5f	34	6	from	from	IN
cord-304487-ycvu5l5f	34	7	a	a	DT
cord-304487-ycvu5l5f	34	8	probable	probable	JJ
cord-304487-ycvu5l5f	34	9	transmission	transmission	NN
cord-304487-ycvu5l5f	34	10	pair	pair	NN
cord-304487-ycvu5l5f	34	11	who	who	WP
cord-304487-ycvu5l5f	34	12	resided	reside	VBD
cord-304487-ycvu5l5f	34	13	in	in	IN
cord-304487-ycvu5l5f	34	14	the	the	DT
cord-304487-ycvu5l5f	34	15	same	same	JJ
cord-304487-ycvu5l5f	34	16	house	house	NN
cord-304487-ycvu5l5f	34	17	,	,	,
cord-304487-ycvu5l5f	34	18	they	-PRON-	PRP
cord-304487-ycvu5l5f	34	19	found	find	VBD
cord-304487-ycvu5l5f	34	20	the	the	DT
cord-304487-ycvu5l5f	34	21	consensus	consensus	NN
cord-304487-ycvu5l5f	34	22	sequences	sequence	NNS
cord-304487-ycvu5l5f	34	23	to	to	TO
cord-304487-ycvu5l5f	34	24	be	be	VB
cord-304487-ycvu5l5f	34	25	identical	identical	JJ
cord-304487-ycvu5l5f	34	26	.	.	.
cord-304487-ycvu5l5f	35	1	However	however	RB
cord-304487-ycvu5l5f	35	2	,	,	,
cord-304487-ycvu5l5f	35	3	deep	deep	JJ
cord-304487-ycvu5l5f	35	4	-	-	HYPH
cord-304487-ycvu5l5f	35	5	sequencing	sequencing	NN
cord-304487-ycvu5l5f	35	6	of	of	IN
cord-304487-ycvu5l5f	35	7	viral	viral	JJ
cord-304487-ycvu5l5f	35	8	genomes	genome	NNS
cord-304487-ycvu5l5f	35	9	from	from	IN
cord-304487-ycvu5l5f	35	10	7	7	CD
cord-304487-ycvu5l5f	35	11	patients	patient	NNS
cord-304487-ycvu5l5f	35	12	(	(	-LRB-
cord-304487-ycvu5l5f	35	13	including	include	VBG
cord-304487-ycvu5l5f	35	14	this	this	DT
cord-304487-ycvu5l5f	35	15	probable	probable	JJ
cord-304487-ycvu5l5f	35	16	transmission	transmission	NN
cord-304487-ycvu5l5f	35	17	pair	pair	NN
cord-304487-ycvu5l5f	35	18	)	)	-RRB-
cord-304487-ycvu5l5f	35	19	,	,	,
cord-304487-ycvu5l5f	35	20	the	the	DT
cord-304487-ycvu5l5f	35	21	authors	author	NNS
cord-304487-ycvu5l5f	35	22	detect	detect	VBP
cord-304487-ycvu5l5f	35	23	substantial	substantial	JJ
cord-304487-ycvu5l5f	35	24	variation	variation	NN
cord-304487-ycvu5l5f	35	25	in	in	IN
cord-304487-ycvu5l5f	35	26	the	the	DT
cord-304487-ycvu5l5f	35	27	number	number	NN
cord-304487-ycvu5l5f	35	28	and	and	CC
cord-304487-ycvu5l5f	35	29	frequency	frequency	NN
cord-304487-ycvu5l5f	35	30	of	of	IN
cord-304487-ycvu5l5f	35	31	minority	minority	NN
cord-304487-ycvu5l5f	35	32	variants	variant	NNS
cord-304487-ycvu5l5f	35	33	within	within	IN
cord-304487-ycvu5l5f	35	34	different	different	JJ
cord-304487-ycvu5l5f	35	35	individuals	individual	NNS
cord-304487-ycvu5l5f	35	36	.	.	.
cord-304487-ycvu5l5f	36	1	Remarkably	remarkably	RB
cord-304487-ycvu5l5f	36	2	,	,	,
cord-304487-ycvu5l5f	36	3	despite	despite	IN
cord-304487-ycvu5l5f	36	4	the	the	DT
cord-304487-ycvu5l5f	36	5	limited	limited	JJ
cord-304487-ycvu5l5f	36	6	number	number	NN
cord-304487-ycvu5l5f	36	7	of	of	IN
cord-304487-ycvu5l5f	36	8	individuals	individual	NNS
cord-304487-ycvu5l5f	36	9	included	include	VBN
cord-304487-ycvu5l5f	36	10	,	,	,
cord-304487-ycvu5l5f	36	11	they	-PRON-	PRP
cord-304487-ycvu5l5f	36	12	found	find	VBD
cord-304487-ycvu5l5f	36	13	many	many	JJ
cord-304487-ycvu5l5f	36	14	of	of	IN
cord-304487-ycvu5l5f	36	15	the	the	DT
cord-304487-ycvu5l5f	36	16	same	same	JJ
cord-304487-ycvu5l5f	36	17	minority	minority	NN
cord-304487-ycvu5l5f	36	18	variants	variant	NNS
cord-304487-ycvu5l5f	36	19	in	in	IN
cord-304487-ycvu5l5f	36	20	different	different	JJ
cord-304487-ycvu5l5f	36	21	,	,	,
cord-304487-ycvu5l5f	36	22	epidemiologically	epidemiologically	RB
cord-304487-ycvu5l5f	36	23	unrelated	unrelated	JJ
cord-304487-ycvu5l5f	36	24	individuals	individual	NNS
cord-304487-ycvu5l5f	36	25	.	.	.
cord-304487-ycvu5l5f	37	1	This	this	DT
cord-304487-ycvu5l5f	37	2	pattern	pattern	NN
cord-304487-ycvu5l5f	37	3	suggests	suggest	VBZ
cord-304487-ycvu5l5f	37	4	that	that	IN
cord-304487-ycvu5l5f	37	5	SARS	SARS	NNP
cord-304487-ycvu5l5f	37	6	-	-	HYPH
cord-304487-ycvu5l5f	37	7	CoV-2	CoV-2	NNP
cord-304487-ycvu5l5f	37	8	is	be	VBZ
cord-304487-ycvu5l5f	37	9	predisposed	predispose	VBN
cord-304487-ycvu5l5f	37	10	towards	towards	IN
cord-304487-ycvu5l5f	37	11	particular	particular	JJ
cord-304487-ycvu5l5f	37	12	mutations	mutation	NNS
cord-304487-ycvu5l5f	37	13	,	,	,
cord-304487-ycvu5l5f	37	14	which	which	WDT
cord-304487-ycvu5l5f	37	15	may	may	MD
cord-304487-ycvu5l5f	37	16	continue	continue	VB
cord-304487-ycvu5l5f	37	17	to	to	TO
cord-304487-ycvu5l5f	37	18	re	re	VB
cord-304487-ycvu5l5f	37	19	-	-	VB
cord-304487-ycvu5l5f	37	20	appear	appear	VB
cord-304487-ycvu5l5f	37	21	as	as	IN
cord-304487-ycvu5l5f	37	22	the	the	DT
cord-304487-ycvu5l5f	37	23	virus	virus	NN
cord-304487-ycvu5l5f	37	24	continues	continue	VBZ
cord-304487-ycvu5l5f	37	25	to	to	TO
cord-304487-ycvu5l5f	37	26	spread	spread	VB
cord-304487-ycvu5l5f	37	27	.	.	.
cord-304487-ycvu5l5f	38	1	Recombination	recombination	NN
cord-304487-ycvu5l5f	38	2	is	be	VBZ
cord-304487-ycvu5l5f	38	3	an	an	DT
cord-304487-ycvu5l5f	38	4	ongoing	ongoing	JJ
cord-304487-ycvu5l5f	38	5	process	process	NN
cord-304487-ycvu5l5f	38	6	in	in	IN
cord-304487-ycvu5l5f	38	7	positive	positive	JJ
cord-304487-ycvu5l5f	38	8	-	-	HYPH
cord-304487-ycvu5l5f	38	9	strand	strand	NN
cord-304487-ycvu5l5f	38	10	RNA	RNA	NNP
cord-304487-ycvu5l5f	38	11	viruses	virus	NNS
cord-304487-ycvu5l5f	38	12	[	[	-LRB-
cord-304487-ycvu5l5f	38	13	5	5	CD
cord-304487-ycvu5l5f	38	14	]	]	-RRB-
cord-304487-ycvu5l5f	38	15	,	,	,
cord-304487-ycvu5l5f	38	16	and	and	CC
cord-304487-ycvu5l5f	38	17	coronaviruses	coronaviruse	NNS
cord-304487-ycvu5l5f	38	18	are	be	VBP
cord-304487-ycvu5l5f	38	19	no	no	DT
cord-304487-ycvu5l5f	38	20	exception	exception	NN
cord-304487-ycvu5l5f	38	21	.	.	.
cord-304487-ycvu5l5f	39	1	The	the	DT
cord-304487-ycvu5l5f	39	2	evolutionary	evolutionary	JJ
cord-304487-ycvu5l5f	39	3	history	history	NN
cord-304487-ycvu5l5f	39	4	of	of	IN
cord-304487-ycvu5l5f	39	5	MERS	MERS	NNP
cord-304487-ycvu5l5f	39	6	-	-	HYPH
cord-304487-ycvu5l5f	39	7	CoV	CoV	NNP
cord-304487-ycvu5l5f	39	8	in	in	IN
cord-304487-ycvu5l5f	39	9	its	-PRON-	PRP$
cord-304487-ycvu5l5f	39	10	intermediate	intermediate	JJ
cord-304487-ycvu5l5f	39	11	host	host	NN
cord-304487-ycvu5l5f	39	12	,	,	,
cord-304487-ycvu5l5f	39	13	camels	camel	NNS
cord-304487-ycvu5l5f	39	14	,	,	,
cord-304487-ycvu5l5f	39	15	is	be	VBZ
cord-304487-ycvu5l5f	39	16	littered	litter	VBN
cord-304487-ycvu5l5f	39	17	with	with	IN
cord-304487-ycvu5l5f	39	18	recombination	recombination	NN
cord-304487-ycvu5l5f	39	19	events	event	NNS
cord-304487-ycvu5l5f	39	20	[	[	-LRB-
cord-304487-ycvu5l5f	39	21	6	6	CD
cord-304487-ycvu5l5f	39	22	]	]	-RRB-
cord-304487-ycvu5l5f	39	23	.	.	.
cord-304487-ycvu5l5f	40	1	The	the	DT
cord-304487-ycvu5l5f	40	2	bat	bat	NN
cord-304487-ycvu5l5f	40	3	coronaviruses	coronaviruse	NNS
cord-304487-ycvu5l5f	40	4	from	from	IN
cord-304487-ycvu5l5f	40	5	which	which	WDT
cord-304487-ycvu5l5f	40	6	SARS	SARS	NNP
cord-304487-ycvu5l5f	40	7	-	-	HYPH
cord-304487-ycvu5l5f	40	8	CoV-2	CoV-2	NNP
cord-304487-ycvu5l5f	40	9	descends	descend	VBZ
cord-304487-ycvu5l5f	40	10	also	also	RB
cord-304487-ycvu5l5f	40	11	betray	betray	VB
cord-304487-ycvu5l5f	40	12	a	a	DT
cord-304487-ycvu5l5f	40	13	history	history	NN
cord-304487-ycvu5l5f	40	14	of	of	IN
cord-304487-ycvu5l5f	40	15	recombination	recombination	NN
cord-304487-ycvu5l5f	40	16	[	[	-LRB-
cord-304487-ycvu5l5f	40	17	1	1	CD
cord-304487-ycvu5l5f	40	18	]	]	-RRB-
cord-304487-ycvu5l5f	40	19	,	,	,
cord-304487-ycvu5l5f	40	20	although	although	IN
cord-304487-ycvu5l5f	40	21	there	there	EX
cord-304487-ycvu5l5f	40	22	does	do	VBZ
cord-304487-ycvu5l5f	40	23	not	not	RB
cord-304487-ycvu5l5f	40	24	appear	appear	VB
cord-304487-ycvu5l5f	40	25	to	to	TO
cord-304487-ycvu5l5f	40	26	have	have	VB
cord-304487-ycvu5l5f	40	27	been	be	VBN
cord-304487-ycvu5l5f	40	28	recombination	recombination	NN
cord-304487-ycvu5l5f	40	29	distinguishing	distinguish	VBG
cord-304487-ycvu5l5f	40	30	SARS	SARS	NNP
cord-304487-ycvu5l5f	40	31	-	-	HYPH
cord-304487-ycvu5l5f	40	32	CoV-2	CoV-2	NNP
cord-304487-ycvu5l5f	40	33	from	from	IN
cord-304487-ycvu5l5f	40	34	its	-PRON-	PRP$
cord-304487-ycvu5l5f	40	35	closest	close	JJS
cord-304487-ycvu5l5f	40	36	described	describe	VBN
cord-304487-ycvu5l5f	40	37	relative	relative	NN
cord-304487-ycvu5l5f	40	38	in	in	IN
cord-304487-ycvu5l5f	40	39	bats	bat	NNS
cord-304487-ycvu5l5f	40	40	[	[	-LRB-
cord-304487-ycvu5l5f	40	41	7	7	CD
cord-304487-ycvu5l5f	40	42	]	]	-RRB-
cord-304487-ycvu5l5f	40	43	.	.	.
cord-304487-ycvu5l5f	41	1	In	in	IN
cord-304487-ycvu5l5f	41	2	contrast	contrast	NN
cord-304487-ycvu5l5f	41	3	,	,	,
cord-304487-ycvu5l5f	41	4	the	the	DT
cord-304487-ycvu5l5f	41	5	phylogeny	phylogeny	NN
cord-304487-ycvu5l5f	41	6	for	for	IN
cord-304487-ycvu5l5f	41	7	the	the	DT
cord-304487-ycvu5l5f	41	8	first	first	JJ
cord-304487-ycvu5l5f	41	9	SARS	SARS	NNP
cord-304487-ycvu5l5f	41	10	-	-	HYPH
cord-304487-ycvu5l5f	41	11	CoV	CoV	NNP
cord-304487-ycvu5l5f	41	12	,	,	,
cord-304487-ycvu5l5f	41	13	which	which	WDT
cord-304487-ycvu5l5f	41	14	emerged	emerge	VBD
cord-304487-ycvu5l5f	41	15	in	in	IN
cord-304487-ycvu5l5f	41	16	2002	2002	CD
cord-304487-ycvu5l5f	41	17	,	,	,
cord-304487-ycvu5l5f	41	18	does	do	VBZ
cord-304487-ycvu5l5f	41	19	not	not	RB
cord-304487-ycvu5l5f	41	20	display	display	VB
cord-304487-ycvu5l5f	41	21	evidence	evidence	NN
cord-304487-ycvu5l5f	41	22	for	for	IN
cord-304487-ycvu5l5f	41	23	recombination	recombination	NN
cord-304487-ycvu5l5f	41	24	.	.	.
cord-304487-ycvu5l5f	42	1	It	-PRON-	PRP
cord-304487-ycvu5l5f	42	2	is	be	VBZ
cord-304487-ycvu5l5f	42	3	unlikely	unlikely	JJ
cord-304487-ycvu5l5f	42	4	that	that	IN
cord-304487-ycvu5l5f	42	5	this	this	DT
cord-304487-ycvu5l5f	42	6	virus	virus	NN
cord-304487-ycvu5l5f	42	7	lacked	lack	VBD
cord-304487-ycvu5l5f	42	8	the	the	DT
cord-304487-ycvu5l5f	42	9	capacity	capacity	NN
cord-304487-ycvu5l5f	42	10	for	for	IN
cord-304487-ycvu5l5f	42	11	recombination	recombination	NN
cord-304487-ycvu5l5f	42	12	,	,	,
cord-304487-ycvu5l5f	42	13	only	only	RB
cord-304487-ycvu5l5f	42	14	the	the	DT
cord-304487-ycvu5l5f	42	15	opportunity	opportunity	NN
cord-304487-ycvu5l5f	42	16	.	.	.
cord-304487-ycvu5l5f	43	1	SARS	SARS	NNP
cord-304487-ycvu5l5f	43	2	-	-	HYPH
cord-304487-ycvu5l5f	43	3	CoV-2	CoV-2	NNP
cord-304487-ycvu5l5f	43	4	is	be	VBZ
cord-304487-ycvu5l5f	43	5	presumably	presumably	RB
cord-304487-ycvu5l5f	43	6	constantly	constantly	RB
cord-304487-ycvu5l5f	43	7	recombining	recombine	VBG
cord-304487-ycvu5l5f	43	8	with	with	IN
cord-304487-ycvu5l5f	43	9	itself	-PRON-	PRP
cord-304487-ycvu5l5f	43	10	within	within	IN
cord-304487-ycvu5l5f	43	11	every	every	DT
cord-304487-ycvu5l5f	43	12	infected	infect	VBN
cord-304487-ycvu5l5f	43	13	individual	individual	NN
cord-304487-ycvu5l5f	43	14	.	.	.
cord-304487-ycvu5l5f	44	1	However	however	RB
cord-304487-ycvu5l5f	44	2	,	,	,
cord-304487-ycvu5l5f	44	3	a	a	DT
cord-304487-ycvu5l5f	44	4	homogenous	homogenous	JJ
cord-304487-ycvu5l5f	44	5	population	population	NN
cord-304487-ycvu5l5f	44	6	of	of	IN
cord-304487-ycvu5l5f	44	7	viruses	virus	NNS
cord-304487-ycvu5l5f	44	8	recombining	recombine	VBG
cord-304487-ycvu5l5f	44	9	with	with	IN
cord-304487-ycvu5l5f	44	10	nearly	nearly	RB
cord-304487-ycvu5l5f	44	11	identical	identical	JJ
cord-304487-ycvu5l5f	44	12	relatives	relative	NNS
cord-304487-ycvu5l5f	44	13	will	will	MD
cord-304487-ycvu5l5f	44	14	not	not	RB
cord-304487-ycvu5l5f	44	15	produce	produce	VB
cord-304487-ycvu5l5f	44	16	any	any	DT
cord-304487-ycvu5l5f	44	17	novel	novel	JJ
cord-304487-ycvu5l5f	44	18	genetic	genetic	JJ
cord-304487-ycvu5l5f	44	19	combinations	combination	NNS
cord-304487-ycvu5l5f	44	20	.	.	.
cord-304487-ycvu5l5f	45	1	Genetic	genetic	JJ
cord-304487-ycvu5l5f	45	2	recombination	recombination	NN
cord-304487-ycvu5l5f	45	3	has	have	VBZ
cord-304487-ycvu5l5f	45	4	biological	biological	JJ
cord-304487-ycvu5l5f	45	5	and	and	CC
cord-304487-ycvu5l5f	45	6	evolutionary	evolutionary	JJ
cord-304487-ycvu5l5f	45	7	consequences	consequence	NNS
cord-304487-ycvu5l5f	45	8	only	only	RB
cord-304487-ycvu5l5f	45	9	when	when	WRB
cord-304487-ycvu5l5f	45	10	the	the	DT
cord-304487-ycvu5l5f	45	11	two	two	CD
cord-304487-ycvu5l5f	45	12	recombining	recombine	VBG
cord-304487-ycvu5l5f	45	13	viruses	virus	NNS
cord-304487-ycvu5l5f	45	14	are	be	VBP
cord-304487-ycvu5l5f	45	15	sufficiently	sufficiently	RB
cord-304487-ycvu5l5f	45	16	genetically	genetically	RB
cord-304487-ycvu5l5f	45	17	distinct	distinct	JJ
cord-304487-ycvu5l5f	45	18	.	.	.
cord-304487-ycvu5l5f	46	1	In	in	IN
cord-304487-ycvu5l5f	46	2	Yi	Yi	NNP
cord-304487-ycvu5l5f	46	3	's	's	POS
cord-304487-ycvu5l5f	46	4	article	article	NN
cord-304487-ycvu5l5f	46	5	,	,	,
cord-304487-ycvu5l5f	46	6	the	the	DT
cord-304487-ycvu5l5f	46	7	prospect	prospect	NN
cord-304487-ycvu5l5f	46	8	of	of	IN
cord-304487-ycvu5l5f	46	9	recombination	recombination	NN
cord-304487-ycvu5l5f	46	10	between	between	IN
cord-304487-ycvu5l5f	46	11	genetically	genetically	RB
cord-304487-ycvu5l5f	46	12	distinct	distinct	JJ
cord-304487-ycvu5l5f	46	13	SARS	SARS	NNP
cord-304487-ycvu5l5f	46	14	-	-	HYPH
cord-304487-ycvu5l5f	46	15	CoV-2	CoV-2	NNP
cord-304487-ycvu5l5f	46	16	strains	strain	NNS
cord-304487-ycvu5l5f	46	17	is	be	VBZ
cord-304487-ycvu5l5f	46	18	investigated	investigate	VBN
cord-304487-ycvu5l5f	46	19	.	.	.
cord-304487-ycvu5l5f	47	1	Robust	robust	JJ
cord-304487-ycvu5l5f	47	2	phylogenetic	phylogenetic	JJ
cord-304487-ycvu5l5f	47	3	testing	testing	NN
cord-304487-ycvu5l5f	47	4	for	for	IN
cord-304487-ycvu5l5f	47	5	recombination	recombination	NN
cord-304487-ycvu5l5f	47	6	can	can	MD
cord-304487-ycvu5l5f	47	7	not	not	RB
cord-304487-ycvu5l5f	47	8	be	be	VB
cord-304487-ycvu5l5f	47	9	performed	perform	VBN
cord-304487-ycvu5l5f	47	10	on	on	IN
cord-304487-ycvu5l5f	47	11	such	such	JJ
cord-304487-ycvu5l5f	47	12	closely	closely	RB
cord-304487-ycvu5l5f	47	13	related	related	JJ
cord-304487-ycvu5l5f	47	14	viruses	virus	NNS
cord-304487-ycvu5l5f	47	15	,	,	,
cord-304487-ycvu5l5f	47	16	so	so	RB
cord-304487-ycvu5l5f	47	17	Yi	Yi	NNP
cord-304487-ycvu5l5f	47	18	relies	rely	VBZ
cord-304487-ycvu5l5f	47	19	on	on	IN
cord-304487-ycvu5l5f	47	20	detecting	detect	VBG
cord-304487-ycvu5l5f	47	21	cycles	cycle	NNS
cord-304487-ycvu5l5f	47	22	in	in	IN
cord-304487-ycvu5l5f	47	23	haplotype	haplotype	NN
cord-304487-ycvu5l5f	47	24	maps	map	NNS
cord-304487-ycvu5l5f	47	25	.	.	.
cord-304487-ycvu5l5f	48	1	These	these	DT
cord-304487-ycvu5l5f	48	2	cycles	cycle	NNS
cord-304487-ycvu5l5f	48	3	represent	represent	VBP
cord-304487-ycvu5l5f	48	4	potentially	potentially	RB
cord-304487-ycvu5l5f	48	5	non	non	JJ
cord-304487-ycvu5l5f	48	6	-	-	JJ
cord-304487-ycvu5l5f	48	7	linear	linear	JJ
cord-304487-ycvu5l5f	48	8	evolutionary	evolutionary	JJ
cord-304487-ycvu5l5f	48	9	histories	history	NNS
cord-304487-ycvu5l5f	48	10	of	of	IN
cord-304487-ycvu5l5f	48	11	viral	viral	JJ
cord-304487-ycvu5l5f	48	12	evolution	evolution	NN
cord-304487-ycvu5l5f	48	13	that	that	WDT
cord-304487-ycvu5l5f	48	14	is	be	VBZ
cord-304487-ycvu5l5f	48	15	consistent	consistent	JJ
cord-304487-ycvu5l5f	48	16	with	with	IN
cord-304487-ycvu5l5f	48	17	recombination	recombination	NN
cord-304487-ycvu5l5f	48	18	.	.	.
cord-304487-ycvu5l5f	49	1	However	however	RB
cord-304487-ycvu5l5f	49	2	,	,	,
cord-304487-ycvu5l5f	49	3	among	among	IN
cord-304487-ycvu5l5f	49	4	such	such	JJ
cord-304487-ycvu5l5f	49	5	closely	closely	RB
cord-304487-ycvu5l5f	49	6	related	related	JJ
cord-304487-ycvu5l5f	49	7	strains	strain	NNS
cord-304487-ycvu5l5f	49	8	,	,	,
cord-304487-ycvu5l5f	49	9	the	the	DT
cord-304487-ycvu5l5f	49	10	signal	signal	NN
cord-304487-ycvu5l5f	49	11	for	for	IN
cord-304487-ycvu5l5f	49	12	recombination	recombination	NN
cord-304487-ycvu5l5f	49	13	can	can	MD
cord-304487-ycvu5l5f	49	14	not	not	RB
cord-304487-ycvu5l5f	49	15	be	be	VB
cord-304487-ycvu5l5f	49	16	reliably	reliably	RB
cord-304487-ycvu5l5f	49	17	disentangled	disentangle	VBN
cord-304487-ycvu5l5f	49	18	from	from	IN
cord-304487-ycvu5l5f	49	19	convergent	convergent	JJ
cord-304487-ycvu5l5f	49	20	evolution	evolution	NN
cord-304487-ycvu5l5f	49	21	.	.	.
cord-304487-ycvu5l5f	50	1	A	a	DT
cord-304487-ycvu5l5f	50	2	scenario	scenario	NN
cord-304487-ycvu5l5f	50	3	for	for	IN
cord-304487-ycvu5l5f	50	4	convergent	convergent	JJ
cord-304487-ycvu5l5f	50	5	evolution	evolution	NN
cord-304487-ycvu5l5f	50	6	is	be	VBZ
cord-304487-ycvu5l5f	50	7	plausible	plausible	JJ
cord-304487-ycvu5l5f	50	8	based	base	VBN
cord-304487-ycvu5l5f	50	9	the	the	DT
cord-304487-ycvu5l5f	50	10	observation	observation	NN
cord-304487-ycvu5l5f	50	11	of	of	IN
cord-304487-ycvu5l5f	50	12	recurrent	recurrent	JJ
cord-304487-ycvu5l5f	50	13	minority	minority	NN
cord-304487-ycvu5l5f	50	14	variants	variant	NNS
cord-304487-ycvu5l5f	50	15	reported	report	VBN
cord-304487-ycvu5l5f	50	16	by	by	IN
cord-304487-ycvu5l5f	50	17	Li	Li	NNP
cord-304487-ycvu5l5f	50	18	et	et	NNP
cord-304487-ycvu5l5f	50	19	al	al	NNP
cord-304487-ycvu5l5f	50	20	.	.	.
cord-304487-ycvu5l5f	51	1	Nonetheless	nonetheless	RB
cord-304487-ycvu5l5f	51	2	,	,	,
cord-304487-ycvu5l5f	51	3	as	as	IN
cord-304487-ycvu5l5f	51	4	more	more	JJR
cord-304487-ycvu5l5f	51	5	SARS	SARS	NNP
cord-304487-ycvu5l5f	51	6	-	-	HYPH
cord-304487-ycvu5l5f	51	7	CoV-2	CoV-2	NNP
cord-304487-ycvu5l5f	51	8	genomes	genome	NNS
cord-304487-ycvu5l5f	51	9	are	be	VBP
cord-304487-ycvu5l5f	51	10	sequenced	sequence	VBN
cord-304487-ycvu5l5f	51	11	and	and	CC
cord-304487-ycvu5l5f	51	12	analyzed	analyze	VBN
cord-304487-ycvu5l5f	51	13	,	,	,
cord-304487-ycvu5l5f	51	14	a	a	DT
cord-304487-ycvu5l5f	51	15	clearer	clear	JJR
cord-304487-ycvu5l5f	51	16	picture	picture	NN
cord-304487-ycvu5l5f	51	17	of	of	IN
cord-304487-ycvu5l5f	51	18	the	the	DT
cord-304487-ycvu5l5f	51	19	role	role	NN
cord-304487-ycvu5l5f	51	20	recombination	recombination	NN
cord-304487-ycvu5l5f	51	21	plays	play	VBZ
cord-304487-ycvu5l5f	51	22	in	in	IN
cord-304487-ycvu5l5f	51	23	SARS	SARS	NNP
cord-304487-ycvu5l5f	51	24	-	-	HYPH
cord-304487-ycvu5l5f	51	25	CoV-2	CoV-2	NNP
cord-304487-ycvu5l5f	51	26	will	will	MD
cord-304487-ycvu5l5f	51	27	likely	likely	RB
cord-304487-ycvu5l5f	51	28	emerge	emerge	VB
cord-304487-ycvu5l5f	51	29	.	.	.
cord-304487-ycvu5l5f	52	1	The	the	DT
cord-304487-ycvu5l5f	52	2	impact	impact	NN
cord-304487-ycvu5l5f	52	3	of	of	IN
cord-304487-ycvu5l5f	52	4	this	this	DT
cord-304487-ycvu5l5f	52	5	increasing	increase	VBG
cord-304487-ycvu5l5f	52	6	genetic	genetic	JJ
cord-304487-ycvu5l5f	52	7	diversity	diversity	NN
cord-304487-ycvu5l5f	52	8	on	on	IN
cord-304487-ycvu5l5f	52	9	a	a	DT
cord-304487-ycvu5l5f	52	10	hypothetical	hypothetical	JJ
cord-304487-ycvu5l5f	52	11	vaccine	vaccine	NN
cord-304487-ycvu5l5f	52	12	design	design	NN
cord-304487-ycvu5l5f	52	13	is	be	VBZ
cord-304487-ycvu5l5f	52	14	likely	likely	RB
cord-304487-ycvu5l5f	52	15	minimal	minimal	JJ
cord-304487-ycvu5l5f	52	16	.	.	.
cord-304487-ycvu5l5f	53	1	Vaccine	vaccine	NN
cord-304487-ycvu5l5f	53	2	efficacy	efficacy	NN
cord-304487-ycvu5l5f	53	3	endures	endure	VBZ
cord-304487-ycvu5l5f	53	4	against	against	IN
cord-304487-ycvu5l5f	53	5	circulating	circulate	VBG
cord-304487-ycvu5l5f	53	6	human	human	JJ
cord-304487-ycvu5l5f	53	7	RNA	RNA	NNP
cord-304487-ycvu5l5f	53	8	viruses	virus	NNS
cord-304487-ycvu5l5f	53	9	that	that	WDT
cord-304487-ycvu5l5f	53	10	have	have	VBP
cord-304487-ycvu5l5f	53	11	accumulated	accumulate	VBN
cord-304487-ycvu5l5f	53	12	decades	decade	NNS
cord-304487-ycvu5l5f	53	13	of	of	IN
cord-304487-ycvu5l5f	53	14	evolutionary	evolutionary	JJ
cord-304487-ycvu5l5f	53	15	diversity	diversity	NN
cord-304487-ycvu5l5f	53	16	(	(	-LRB-
cord-304487-ycvu5l5f	53	17	e.g.	e.g.	RB
cord-304487-ycvu5l5f	53	18	,	,	,
cord-304487-ycvu5l5f	53	19	measles	measle	NNS
cord-304487-ycvu5l5f	53	20	and	and	CC
cord-304487-ycvu5l5f	53	21	polio	polio	NN
cord-304487-ycvu5l5f	53	22	virus	virus	NN
cord-304487-ycvu5l5f	53	23	)	)	-RRB-
cord-304487-ycvu5l5f	53	24	.	.	.
cord-304487-ycvu5l5f	54	1	The	the	DT
cord-304487-ycvu5l5f	54	2	obvious	obvious	JJ
cord-304487-ycvu5l5f	54	3	exceptions	exception	NNS
cord-304487-ycvu5l5f	54	4	to	to	IN
cord-304487-ycvu5l5f	54	5	this	this	DT
cord-304487-ycvu5l5f	54	6	endurance	endurance	NN
cord-304487-ycvu5l5f	54	7	are	be	VBP
cord-304487-ycvu5l5f	54	8	seasonal	seasonal	JJ
cord-304487-ycvu5l5f	54	9	influenza	influenza	NN
cord-304487-ycvu5l5f	54	10	viruses	virus	NNS
cord-304487-ycvu5l5f	54	11	,	,	,
cord-304487-ycvu5l5f	54	12	where	where	WRB
cord-304487-ycvu5l5f	54	13	protective	protective	JJ
cord-304487-ycvu5l5f	54	14	immunity	immunity	NN
cord-304487-ycvu5l5f	54	15	extends	extend	VBZ
cord-304487-ycvu5l5f	54	16	over	over	RP
cord-304487-ycvu5l5f	54	17	only	only	RB
cord-304487-ycvu5l5f	54	18	a	a	DT
cord-304487-ycvu5l5f	54	19	matter	matter	NN
cord-304487-ycvu5l5f	54	20	of	of	IN
cord-304487-ycvu5l5f	54	21	years	year	NNS
cord-304487-ycvu5l5f	54	22	of	of	IN
cord-304487-ycvu5l5f	54	23	viral	viral	JJ
cord-304487-ycvu5l5f	54	24	evolution	evolution	NN
cord-304487-ycvu5l5f	54	25	.	.	.
cord-304487-ycvu5l5f	55	1	Whether	whether	IN
cord-304487-ycvu5l5f	55	2	a	a	DT
cord-304487-ycvu5l5f	55	3	successful	successful	JJ
cord-304487-ycvu5l5f	55	4	vaccine	vaccine	NN
cord-304487-ycvu5l5f	55	5	is	be	VBZ
cord-304487-ycvu5l5f	55	6	developed	develop	VBN
cord-304487-ycvu5l5f	55	7	or	or	CC
cord-304487-ycvu5l5f	55	8	SARS	SARS	NNP
cord-304487-ycvu5l5f	55	9	-	-	HYPH
cord-304487-ycvu5l5f	55	10	CoV-2	CoV-2	NNP
cord-304487-ycvu5l5f	55	11	continues	continue	VBZ
cord-304487-ycvu5l5f	55	12	to	to	TO
cord-304487-ycvu5l5f	55	13	spread	spread	VB
cord-304487-ycvu5l5f	55	14	remains	remain	NNS
cord-304487-ycvu5l5f	55	15	to	to	TO
cord-304487-ycvu5l5f	55	16	be	be	VB
cord-304487-ycvu5l5f	55	17	seen	see	VBN
cord-304487-ycvu5l5f	55	18	.	.	.
cord-304487-ycvu5l5f	56	1	At	at	IN
cord-304487-ycvu5l5f	56	2	the	the	DT
cord-304487-ycvu5l5f	56	3	beginning	beginning	NN
cord-304487-ycvu5l5f	56	4	of	of	IN
cord-304487-ycvu5l5f	56	5	a	a	DT
cord-304487-ycvu5l5f	56	6	zoonotic	zoonotic	JJ
cord-304487-ycvu5l5f	56	7	event	event	NN
cord-304487-ycvu5l5f	56	8	,	,	,
cord-304487-ycvu5l5f	56	9	viral	viral	JJ
cord-304487-ycvu5l5f	56	10	adaptation	adaptation	NN
cord-304487-ycvu5l5f	56	11	is	be	VBZ
cord-304487-ycvu5l5f	56	12	difficult	difficult	JJ
cord-304487-ycvu5l5f	56	13	.	.	.
cord-304487-ycvu5l5f	57	1	The	the	DT
cord-304487-ycvu5l5f	57	2	viral	viral	JJ
cord-304487-ycvu5l5f	57	3	effective	effective	JJ
cord-304487-ycvu5l5f	57	4	population	population	NN
cord-304487-ycvu5l5f	57	5	size	size	NN
cord-304487-ycvu5l5f	57	6	(	(	-LRB-
cord-304487-ycvu5l5f	57	7	an	an	DT
cord-304487-ycvu5l5f	57	8	amalgam	amalgam	NN
cord-304487-ycvu5l5f	57	9	of	of	IN
cord-304487-ycvu5l5f	57	10	the	the	DT
cord-304487-ycvu5l5f	57	11	number	number	NN
cord-304487-ycvu5l5f	57	12	of	of	IN
cord-304487-ycvu5l5f	57	13	productive	productive	JJ
cord-304487-ycvu5l5f	57	14	infections	infection	NNS
cord-304487-ycvu5l5f	57	15	and	and	CC
cord-304487-ycvu5l5f	57	16	the	the	DT
cord-304487-ycvu5l5f	57	17	genetic	genetic	JJ
cord-304487-ycvu5l5f	57	18	diversity	diversity	NN
cord-304487-ycvu5l5f	57	19	)	)	-RRB-
cord-304487-ycvu5l5f	57	20	is	be	VBZ
cord-304487-ycvu5l5f	57	21	low	low	JJ
cord-304487-ycvu5l5f	57	22	;	;	:
cord-304487-ycvu5l5f	57	23	thus	thus	RB
cord-304487-ycvu5l5f	57	24	,	,	,
cord-304487-ycvu5l5f	57	25	natural	natural	JJ
cord-304487-ycvu5l5f	57	26	selection	selection	NN
cord-304487-ycvu5l5f	57	27	will	will	MD
cord-304487-ycvu5l5f	57	28	be	be	VB
cord-304487-ycvu5l5f	57	29	inefficient	inefficient	JJ
cord-304487-ycvu5l5f	57	30	,	,	,
cord-304487-ycvu5l5f	57	31	and	and	CC
cord-304487-ycvu5l5f	57	32	recombination	recombination	NN
cord-304487-ycvu5l5f	57	33	will	will	MD
cord-304487-ycvu5l5f	57	34	not	not	RB
cord-304487-ycvu5l5f	57	35	result	result	VB
cord-304487-ycvu5l5f	57	36	in	in	IN
cord-304487-ycvu5l5f	57	37	particularly	particularly	RB
cord-304487-ycvu5l5f	57	38	novel	novel	JJ
cord-304487-ycvu5l5f	57	39	combinations	combination	NNS
cord-304487-ycvu5l5f	57	40	.	.	.
cord-304487-ycvu5l5f	58	1	However	however	RB
cord-304487-ycvu5l5f	58	2	,	,	,
cord-304487-ycvu5l5f	58	3	as	as	IN
cord-304487-ycvu5l5f	58	4	the	the	DT
cord-304487-ycvu5l5f	58	5	number	number	NN
cord-304487-ycvu5l5f	58	6	of	of	IN
cord-304487-ycvu5l5f	58	7	infections	infection	NNS
cord-304487-ycvu5l5f	58	8	increases	increase	NNS
cord-304487-ycvu5l5f	58	9	and	and	CC
cord-304487-ycvu5l5f	58	10	the	the	DT
cord-304487-ycvu5l5f	58	11	circulating	circulate	VBG
cord-304487-ycvu5l5f	58	12	viruses	virus	NNS
cord-304487-ycvu5l5f	58	13	become	become	VBP
cord-304487-ycvu5l5f	58	14	more	more	RBR
cord-304487-ycvu5l5f	58	15	genetically	genetically	RB
cord-304487-ycvu5l5f	58	16	distinct	distinct	JJ
cord-304487-ycvu5l5f	58	17	,	,	,
cord-304487-ycvu5l5f	58	18	natural	natural	JJ
cord-304487-ycvu5l5f	58	19	selection	selection	NN
cord-304487-ycvu5l5f	58	20	will	will	MD
cord-304487-ycvu5l5f	58	21	become	become	VB
cord-304487-ycvu5l5f	58	22	more	more	RBR
cord-304487-ycvu5l5f	58	23	efficient	efficient	JJ
cord-304487-ycvu5l5f	58	24	,	,	,
cord-304487-ycvu5l5f	58	25	making	make	VBG
cord-304487-ycvu5l5f	58	26	viral	viral	JJ
cord-304487-ycvu5l5f	58	27	adaptation	adaptation	NN
cord-304487-ycvu5l5f	58	28	more	more	JJR
cord-304487-ycvu5l5f	58	29	of	of	IN
cord-304487-ycvu5l5f	58	30	a	a	DT
cord-304487-ycvu5l5f	58	31	possibility	possibility	NN
cord-304487-ycvu5l5f	58	32	.	.	.
cord-304487-ycvu5l5f	59	1	Nonetheless	nonetheless	RB
cord-304487-ycvu5l5f	59	2	,	,	,
cord-304487-ycvu5l5f	59	3	when	when	WRB
cord-304487-ycvu5l5f	59	4	SARS	SARS	NNP
cord-304487-ycvu5l5f	59	5	-	-	HYPH
cord-304487-ycvu5l5f	59	6	CoV-2	CoV-2	NNP
cord-304487-ycvu5l5f	59	7	arrived	arrive	VBD
cord-304487-ycvu5l5f	59	8	in	in	IN
cord-304487-ycvu5l5f	59	9	humans	human	NNS
cord-304487-ycvu5l5f	59	10	,	,	,
cord-304487-ycvu5l5f	59	11	it	-PRON-	PRP
cord-304487-ycvu5l5f	59	12	was	be	VBD
cord-304487-ycvu5l5f	59	13	already	already	RB
cord-304487-ycvu5l5f	59	14	well	well	RB
cord-304487-ycvu5l5f	59	15	suited	suited	JJ
cord-304487-ycvu5l5f	59	16	for	for	IN
cord-304487-ycvu5l5f	59	17	person	person	NN
cord-304487-ycvu5l5f	59	18	-	-	HYPH
cord-304487-ycvu5l5f	59	19	to	to	IN
cord-304487-ycvu5l5f	59	20	-	-	HYPH
cord-304487-ycvu5l5f	59	21	person	person	NN
cord-304487-ycvu5l5f	59	22	transmission	transmission	NN
cord-304487-ycvu5l5f	59	23	,	,	,
cord-304487-ycvu5l5f	59	24	with	with	IN
cord-304487-ycvu5l5f	59	25	pathogenic	pathogenic	JJ
cord-304487-ycvu5l5f	59	26	consequences	consequence	NNS
cord-304487-ycvu5l5f	59	27	.	.	.
cord-304487-ycvu5l5f	60	1	Furthermore	furthermore	RB
cord-304487-ycvu5l5f	60	2	,	,	,
cord-304487-ycvu5l5f	60	3	it	-PRON-	PRP
cord-304487-ycvu5l5f	60	4	is	be	VBZ
cord-304487-ycvu5l5f	60	5	worth	worth	JJ
cord-304487-ycvu5l5f	60	6	remembering	remember	VBG
cord-304487-ycvu5l5f	60	7	that	that	IN
cord-304487-ycvu5l5f	60	8	the	the	DT
cord-304487-ycvu5l5f	60	9	evolutionary	evolutionary	JJ
cord-304487-ycvu5l5f	60	10	landscape	landscape	NN
cord-304487-ycvu5l5f	60	11	that	that	IN
cord-304487-ycvu5l5f	60	12	SARS	SARS	NNP
cord-304487-ycvu5l5f	60	13	-	-	HYPH
cord-304487-ycvu5l5f	60	14	CoV-2	CoV-2	NNP
cord-304487-ycvu5l5f	60	15	will	will	MD
cord-304487-ycvu5l5f	60	16	explore	explore	VB
cord-304487-ycvu5l5f	60	17	in	in	IN
cord-304487-ycvu5l5f	60	18	humans	human	NNS
cord-304487-ycvu5l5f	60	19	is	be	VBZ
cord-304487-ycvu5l5f	60	20	dwarfed	dwarf	VBN
cord-304487-ycvu5l5f	60	21	by	by	IN
cord-304487-ycvu5l5f	60	22	its	-PRON-	PRP$
cord-304487-ycvu5l5f	60	23	previous	previous	JJ
cord-304487-ycvu5l5f	60	24	exploration	exploration	NN
cord-304487-ycvu5l5f	60	25	in	in	IN
cord-304487-ycvu5l5f	60	26	bats	bat	NNS
cord-304487-ycvu5l5f	60	27	.	.	.
cord-304487-ycvu5l5f	61	1	For	for	IN
cord-304487-ycvu5l5f	61	2	now	now	RB
cord-304487-ycvu5l5f	61	3	,	,	,
cord-304487-ycvu5l5f	61	4	SARS	SARS	NNP
cord-304487-ycvu5l5f	61	5	-	-	HYPH
cord-304487-ycvu5l5f	61	6	CoV-2	CoV-2	NNP
cord-304487-ycvu5l5f	61	7	genetic	genetic	JJ
cord-304487-ycvu5l5f	61	8	variation	variation	NN
cord-304487-ycvu5l5f	61	9	is	be	VBZ
cord-304487-ycvu5l5f	61	10	likely	likely	RB
cord-304487-ycvu5l5f	61	11	evolutionarily	evolutionarily	RB
cord-304487-ycvu5l5f	61	12	inconsequential	inconsequential	JJ
cord-304487-ycvu5l5f	61	13	and	and	CC
cord-304487-ycvu5l5f	61	14	will	will	MD
cord-304487-ycvu5l5f	61	15	be	be	VB
cord-304487-ycvu5l5f	61	16	more	more	RBR
cord-304487-ycvu5l5f	61	17	important	important	JJ
cord-304487-ycvu5l5f	61	18	for	for	IN
cord-304487-ycvu5l5f	61	19	facilitating	facilitate	VBG
cord-304487-ycvu5l5f	61	20	molecular	molecular	JJ
cord-304487-ycvu5l5f	61	21	epidemiology	epidemiology	NN
cord-304487-ycvu5l5f	61	22	in	in	IN
cord-304487-ycvu5l5f	61	23	tracing	trace	VBG
cord-304487-ycvu5l5f	61	24	the	the	DT
cord-304487-ycvu5l5f	61	25	origins	origin	NNS
cord-304487-ycvu5l5f	61	26	of	of	IN
cord-304487-ycvu5l5f	61	27	novel	novel	JJ
cord-304487-ycvu5l5f	61	28	clusters	cluster	NNS
cord-304487-ycvu5l5f	61	29	of	of	IN
cord-304487-ycvu5l5f	61	30	viral	viral	JJ
cord-304487-ycvu5l5f	61	31	infection	infection	NN
cord-304487-ycvu5l5f	61	32	.	.	.
cord-304487-ycvu5l5f	62	1	Dr.	Dr.	NNP
cord-304487-ycvu5l5f	62	2	Wertheim	Wertheim	NNP
cord-304487-ycvu5l5f	62	3	reports	report	VBZ
cord-304487-ycvu5l5f	62	4	grants	grant	NNS
cord-304487-ycvu5l5f	62	5	from	from	IN
cord-304487-ycvu5l5f	62	6	National	National	NNP
cord-304487-ycvu5l5f	62	7	Institutes	Institutes	NNPS
cord-304487-ycvu5l5f	62	8	of	of	IN
cord-304487-ycvu5l5f	62	9	Health	Health	NNP
cord-304487-ycvu5l5f	62	10	(	(	-LRB-
cord-304487-ycvu5l5f	62	11	NIH	NIH	NNP
cord-304487-ycvu5l5f	62	12	)	)	-RRB-
cord-304487-ycvu5l5f	62	13	,	,	,
cord-304487-ycvu5l5f	62	14	and	and	CC
cord-304487-ycvu5l5f	62	15	grants	grant	NNS
cord-304487-ycvu5l5f	62	16	from	from	IN
cord-304487-ycvu5l5f	62	17	Centers	Centers	NNPS
cord-304487-ycvu5l5f	62	18	for	for	IN
cord-304487-ycvu5l5f	62	19	Disease	Disease	NNP
cord-304487-ycvu5l5f	62	20	Control	Control	NNP
cord-304487-ycvu5l5f	62	21	and	and	CC
cord-304487-ycvu5l5f	62	22	Prevention	Prevention	NNP
cord-304487-ycvu5l5f	62	23	(	(	-LRB-
cord-304487-ycvu5l5f	62	24	CDC	CDC	NNP
cord-304487-ycvu5l5f	62	25	)	)	-RRB-
cord-304487-ycvu5l5f	62	26	,	,	,
cord-304487-ycvu5l5f	62	27	outside	outside	IN
cord-304487-ycvu5l5f	62	28	the	the	DT
cord-304487-ycvu5l5f	62	29	submitted	submit	VBN
cord-304487-ycvu5l5f	62	30	work	work	NN
cord-304487-ycvu5l5f	62	31	;	;	:
cord-304487-ycvu5l5f	62	32	He	-PRON-	PRP
cord-304487-ycvu5l5f	62	33	has	have	VBZ
cord-304487-ycvu5l5f	62	34	no	no	DT
cord-304487-ycvu5l5f	62	35	conflicts	conflict	NNS
cord-304487-ycvu5l5f	62	36	of	of	IN
cord-304487-ycvu5l5f	62	37	interest	interest	NN
cord-304487-ycvu5l5f	62	38	to	to	TO
cord-304487-ycvu5l5f	62	39	disclose	disclose	VB
cord-304487-ycvu5l5f	62	40	.	.	.
cord-304487-ycvu5l5f	63	1	Genomic	genomic	JJ
cord-304487-ycvu5l5f	63	2	characterisation	characterisation	NN
cord-304487-ycvu5l5f	63	3	and	and	CC
cord-304487-ycvu5l5f	63	4	epidemiology	epidemiology	NN
cord-304487-ycvu5l5f	63	5	of	of	IN
cord-304487-ycvu5l5f	63	6	2019	2019	CD
cord-304487-ycvu5l5f	63	7	novel	novel	JJ
cord-304487-ycvu5l5f	63	8	coronavirus	coronavirus	NN
cord-304487-ycvu5l5f	63	9	:	:	:
cord-304487-ycvu5l5f	63	10	implications	implication	NNS
cord-304487-ycvu5l5f	63	11	for	for	IN
cord-304487-ycvu5l5f	63	12	virus	virus	NN
cord-304487-ycvu5l5f	63	13	origins	origin	NNS
cord-304487-ycvu5l5f	63	14	and	and	CC
cord-304487-ycvu5l5f	63	15	receptor	receptor	NN
cord-304487-ycvu5l5f	63	16	binding	bind	VBG
cord-304487-ycvu5l5f	63	17	A	a	DT
cord-304487-ycvu5l5f	63	18	pneumonia	pneumonia	NN
cord-304487-ycvu5l5f	63	19	outbreak	outbreak	NN
cord-304487-ycvu5l5f	63	20	associated	associate	VBN
cord-304487-ycvu5l5f	63	21	with	with	IN
cord-304487-ycvu5l5f	63	22	a	a	DT
cord-304487-ycvu5l5f	63	23	new	new	JJ
cord-304487-ycvu5l5f	63	24	coronavirus	coronavirus	NN
cord-304487-ycvu5l5f	63	25	of	of	IN
cord-304487-ycvu5l5f	63	26	probable	probable	JJ
cord-304487-ycvu5l5f	63	27	bat	bat	NN
cord-304487-ycvu5l5f	64	1	origin	origin	NNP
cord-304487-ycvu5l5f	65	1	A	a	DT
cord-304487-ycvu5l5f	65	2	case	case	NN
cord-304487-ycvu5l5f	65	3	for	for	IN
cord-304487-ycvu5l5f	65	4	the	the	DT
cord-304487-ycvu5l5f	65	5	ancient	ancient	JJ
cord-304487-ycvu5l5f	65	6	origin	origin	NN
cord-304487-ycvu5l5f	65	7	of	of	IN
cord-304487-ycvu5l5f	65	8	coronaviruses	coronaviruse	NNS
cord-304487-ycvu5l5f	66	1	Identifying	identify	VBG
cord-304487-ycvu5l5f	66	2	genetic	genetic	JJ
cord-304487-ycvu5l5f	66	3	markers	marker	NNS
cord-304487-ycvu5l5f	66	4	of	of	IN
cord-304487-ycvu5l5f	66	5	adaptation	adaptation	NN
cord-304487-ycvu5l5f	66	6	for	for	IN
cord-304487-ycvu5l5f	66	7	surveillance	surveillance	NN
cord-304487-ycvu5l5f	66	8	of	of	IN
cord-304487-ycvu5l5f	66	9	viral	viral	JJ
cord-304487-ycvu5l5f	66	10	host	host	NN
cord-304487-ycvu5l5f	66	11	jumps	jump	VBZ
cord-304487-ycvu5l5f	66	12	Evolutionary	evolutionary	JJ
cord-304487-ycvu5l5f	66	13	aspects	aspect	NNS
cord-304487-ycvu5l5f	66	14	of	of	IN
cord-304487-ycvu5l5f	66	15	recombination	recombination	NN
cord-304487-ycvu5l5f	66	16	in	in	IN
cord-304487-ycvu5l5f	66	17	RNA	RNA	NNP
cord-304487-ycvu5l5f	66	18	viruses	virus	NNS
cord-304487-ycvu5l5f	66	19	MERS	MERS	NNP
cord-304487-ycvu5l5f	66	20	-	-	HYPH
cord-304487-ycvu5l5f	66	21	CoV	cov	NN
cord-304487-ycvu5l5f	66	22	spillover	spillover	NN
cord-304487-ycvu5l5f	66	23	at	at	IN
cord-304487-ycvu5l5f	66	24	the	the	DT
cord-304487-ycvu5l5f	66	25	camel	camel	NN
cord-304487-ycvu5l5f	66	26	-	-	HYPH
cord-304487-ycvu5l5f	66	27	human	human	NN
cord-304487-ycvu5l5f	66	28	interface	interface	NN
cord-304487-ycvu5l5f	66	29	Full	full	JJ
cord-304487-ycvu5l5f	66	30	-	-	HYPH
cord-304487-ycvu5l5f	66	31	genome	genome	NN
cord-304487-ycvu5l5f	66	32	evolutionary	evolutionary	JJ
cord-304487-ycvu5l5f	66	33	analysis	analysis	NN
cord-304487-ycvu5l5f	66	34	of	of	IN
cord-304487-ycvu5l5f	66	35	the	the	DT
cord-304487-ycvu5l5f	66	36	novel	novel	JJ
cord-304487-ycvu5l5f	66	37	corona	corona	NN
cord-304487-ycvu5l5f	66	38	virus	virus	NN
cord-304487-ycvu5l5f	66	39	(	(	-LRB-
cord-304487-ycvu5l5f	66	40	2019-nCoV	2019-ncov	CD
cord-304487-ycvu5l5f	66	41	)	)	-RRB-
cord-304487-ycvu5l5f	67	1	rejects	reject	VBZ
cord-304487-ycvu5l5f	67	2	the	the	DT
cord-304487-ycvu5l5f	67	3	hypothesis	hypothesis	NN
cord-304487-ycvu5l5f	67	4	of	of	IN
cord-304487-ycvu5l5f	67	5	emergence	emergence	NN
cord-304487-ycvu5l5f	67	6	as	as	IN
cord-304487-ycvu5l5f	67	7	a	a	DT
cord-304487-ycvu5l5f	67	8	result	result	NN
cord-304487-ycvu5l5f	67	9	of	of	IN
cord-304487-ycvu5l5f	67	10	a	a	DT
cord-304487-ycvu5l5f	67	11	recent	recent	JJ
cord-304487-ycvu5l5f	67	12	recombination	recombination	NN
cord-304487-ycvu5l5f	67	13	event	event	NN