id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-333320-ndmmbckb	Samore, M.	SARS-CoV-2 seroprevalence and detection fraction in Utah urban populations from a probability-based sample	2020-10-27		.txt	text/plain	7433	403	53	Probability-based sampling provides an effective method for robust estimates of community-based SARS-CoV-2 seroprevalence and detection fraction among urban populations in Utah. Although seroprevalence has been touted as a more standardized way to estimate the incidence of SaRS-COV-2 infection across different populations, it also presents challenges because of inconsistencies in test performance and sampling methods. Using a statistical sampling frame and adjusting for test performance and non-response, we estimated the prevalence of IgG antibody to SARS-CoV-2 in four urban counties in Utah between May and June to be only 0.8%. We used a serological test that is reported by the manufacturer to have a specificity at 99.6%; however, even at this level of accuracy, statistically accounting for false positives is necessary given the low population prevalence of IgG antibody to SARS-CoV-2.	./cache/cord-333320-ndmmbckb.txt	./txt/cord-333320-ndmmbckb.txt