id	author	title	date	pages	extension	mime	words	sentences	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	3163	156	51	A novel coronavirus named "severe acute respiratory syndrome coronavirus 2" (SARS-CoV-2) was first identified in January 2020 as the pathogen responsible for a cluster of cases of atypical pneumonia in Wuhan, a large city located in Hubei province in central China. 13 Here, we retrospectively analyse data on cases identified outside of Hubei province through the Chinese Public Health Event Surveillance System at the early stage of transmission in China, in order to provide insights on the transmission dynamics of COVID-19. In these pairs of primary and secondary cases, we fitted a normal distribution to the serial intervals between illness onset dates, allowing for negative and zero serial intervals, and correcting for growth rates in the early stage of an epidemic. [22] [23] [24] [25] [26] Pre-symptomatic infectiousness is generally not thought to occur for most respiratory viruses, but measles is a well-known example of a respiratory infection that can be spread before symptom onset, 27 and viral shedding during the incubation period has also been reported for influenza.	./cache/cord-259368-k8t8brjy.txt	./txt/cord-259368-k8t8brjy.txt