id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-287228-0qm939ve	Hong, Ke	Prolonged presence of viral nucleic acid in clinically recovered COVID-19 patients was not associated with effective infectiousness	2020-10-27		.txt	text/plain	3616	192	51	In one study including 70 patients with COVID-19, 21% clinically recovered patients with two consecutive negative results of nucleic acid detection experienced a later positive testing for SARS-CoV-2, and the longest duration of viral RNA positivity in this study was 45 days following infection [4] . A total of 2860 COVID-19 patients were hospitalized and followed in this hospital since the epidemic, and those with persistent or intermittent viral RNA positivity in respiratory samples (including the nasopharyngeal, oropharyngeal and sputum samples) for at least 4 weeks were included in our study, regardless of the age and their clinical status. However, in most of these studies, PCR testing was used as a marker to indicate the existence of virus, and patients with positive viral RNA was considered infectious though they have been infected for months without further clinical symptoms.	./cache/cord-287228-0qm939ve.txt	./txt/cord-287228-0qm939ve.txt