id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-336094-ssr5y4u3	Blumberg, Dean A.	Vertical Transmission of SARS-CoV-2: What is the Optimal Definition?	2020-06-05		.txt	text/plain	1423	82	47	11 We start with several underlying assumptions (►Fig. 1) as follows: (1) the incubation period is 1 to 14 days 12,13 ; (2) intrauterine infection may potentially occur transplacentally via blood, or via transmission through swallowed or aspirated amniotic fluid; (3) maternal viremia is unlikely during the incubation period >48 hours before symptom onset and the likelihood of positive SARS-CoV-2 through RT-PCR in blood samples is low (< 1%) in COVID-19 patients 9 ; (4) intrapartum transmission may potentially occur due to exposure to maternal blood, vaginal secretions, or feces; (5) early postnatal infection may occur via the respiratory route or due to direct contact with the infected mother or other caretakers, or potential transmission through breast milk (however, to date we are not aware of any reports of viral presence in breast milk); and (6) SARS-CoV-2 virus may be transiently detected for up to 24 hours after birth due to superficial contamination or transient viremia (similar to HIV).	./cache/cord-336094-ssr5y4u3.txt	./txt/cord-336094-ssr5y4u3.txt