id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-273367-gl266pvt	Gunawardana, M.	Longitudinal COVID-19 Surveillance and Characterization in the Workplace with Public Health and Diagnostic Endpoints	2020-07-28		.txt	text/plain	5731	417	59	Study participants (27 employees and 27 household members) consented to provide frequent nasal or oral swab samples that were analyzed by RT-qPCR for SARS-CoV-2 RNA using CDC protocols. While on study, the participant was SARS-CoV-2 RNA positive for at least 71 days and had elevated virus-specific antibody concentrations (medians: IgM, 9.83 ug mL-1; IgG, 11.5 ug mL-1; IgA, 1.29 ug mL-1) in serum samples collected at three timepoints. Conclusions Our clinical study met its primary objectives by using intense longitudinal testing to provide a safe work environment during the COVID-19 pandemic, and elucidating SARS-CoV-2 dynamics in recovering and asymptomatic participants. Subject 557 18, a self-quarantined employee who had just recovered from suspected COVID-19 (based on 558 symptomology) at the start of the study, repeatedly tested negative for SARS-CoV-2 RNA, but 559 tested positive for IgM antibodies that rapidly declined (τ1/2 = 8.8 d, Fig. 4A) .	./cache/cord-273367-gl266pvt.txt	./txt/cord-273367-gl266pvt.txt