id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
cord-267476-j59tm40d	Yong, Sarah Ee Fang	Connecting clusters of COVID-19: an epidemiological and serological investigation	2020-04-21		.txt	text/plain	3569	147	44	We have highlighted the importance of serological testing for epidemiological investigation of COVID-19 cases, and we urge further development of serological testing capabilities. We present findings of investigations from Jan 29 to Feb 24, 2020, that linked two people with COVID-19 from Wuhan, China, to three clusters of COVID-19 cases in Singapore.	cache/cord-267476-j59tm40d.txt	txt/cord-267476-j59tm40d.txt
