id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-326198-6okk3u49	Walker, A.	Genetic structure of SARS-CoV-2 in Western Germany reflects clonal superspreading and multiple independent introduction events	2020-04-30		.txt	text/plain	1943	94	46	An analysis (Supplementary Text) of other publicly available SARS-CoV-2 sequences did not reveal an obvious origin of the Heinsberg outbreak (Supplementary Table S4 ); the Heinsberg isolates are not related to early sequences from other German outbreak areas (Bavaria, Baden Wuerttemberg), and, despite intense Dutch viral sampling efforts (585 available viral genomes from the Netherlands at the time of analysis), our analysis identified only 2 closely related isolates from the Netherlands (one collected on 21 st March, the other with undefined collection date). A minimum spanning tree analysis of unambiguously resolved viral sequences ( Figure 1 ) showed that there were at least 5 clusters of viral haplotypes circulating in the Düsseldorf area; the number of variant positions relative to the SARS-CoV-2 reference genome in the Düsseldorf samples varied between 2 and 13 (Supplementary Table 2 ).	./cache/cord-326198-6okk3u49.txt	./txt/cord-326198-6okk3u49.txt