id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-297884-a6yrtuwf	Burke, R. M.	Enhanced Contact Investigations for Nine Early Travel-Related Cases of SARS-CoV-2 in the United States	2020-05-03		.txt	text/plain	7343	341	49	To understand the prevalence of asymptomatic or pre-symptomatic infection, a convenience sample of actively monitored close contacts was selected from whom to request respiratory (nasopharyngeal [NP] and oropharyngeal [OP]) samples outside of diagnostic specimen collection procedures (i.e., while contacts were asymptomatic or, in some cases, symptomatic with ≥ 1 previous negative SARS-CoV-2 result); some sites were able to request at least one set of samples from all close contacts, but most sites targeted sample collection mainly to close contacts determined to have had high-risk exposures, such as household members. Among 49 HCP who provided care to or came into contact with the infectious fluids of travelassociated case patients and who had at least one set of respiratory samples collected and tested for SARS-CoV-2, the secondary attack rate was 0% (95% CI: 0 -7%).	./cache/cord-297884-a6yrtuwf.txt	./txt/cord-297884-a6yrtuwf.txt