id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-284879-sjkni2uc	Song, Suk-Kyoon	IgG Seroprevalence of COVID-19 among Individuals without a History of the Coronavirus Disease Infection in Daegu, Korea	2020-07-16		.txt	text/plain	2559	146	51	METHODS: Serologic testing for immunoglobulin G antibody based on immunochromatographic assay was conducted in 103 patients and 95 guardians aged 18 to 82 years without any history of COVID-19 diagnosis, who visited outpatient clinics of a single university-affiliated hospital from May 25 to June 5, 2020. 4-15 However, a significant fraction of the population has developed antibodies against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), suggesting that the infection is much more pervasive than implied by the number of confirmed cases. Next, we compared seroprevalence among subgroups stratified by characteristics of study subjects, including age (< 40, 40-59, ≥ 60 years), gender, body mass index (BMI) (< 25, ≥ 25 kg/m 2 ), smoking history (current, previous, never), history of doctor-diagnosed diabetes or hypertension (yes, no), reason for the current hospital visit (patient, guardian), and the presence of COVID-19 confirmed cases among close contacts (yes, no).	./cache/cord-284879-sjkni2uc.txt	./txt/cord-284879-sjkni2uc.txt