id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
cord-259368-k8t8brjy	Ren, Xiang	Evidence for pre‐symptomatic transmission of coronavirus disease 2019 (COVID‐19) in China	2020-08-07		.txt	text/plain	3166	101	40	[12] these studies used cluster cases in limited number of families for analysis, and the relative frequency of pre-symptomatic transmission was not quantified. We examine the characteristics of confirmed cases and compared the demographics, onset symptoms and results of some clinical tests between confirmed sporadic and cluster primary cases and cluster secondary cases.	cache/cord-259368-k8t8brjy.txt	txt/cord-259368-k8t8brjy.txt
