id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-301553-bq8h13np	Lee, Jaehyeon	Letter to the Editor: The Interpretation of COVID-19 Seroprevalence Study Should Be Cautious	2020-09-10		.txt	text/plain	1034	66	48	Conceptualization: Lee Third, although the authors have acknowledged selection bias, they should recognize that the patient group had more of health-related issues compared with general population, resulting limited generalizability of the study. However, when an antibody test is performed to estimate seroprevalence at the population level, even a serological test with moderate sensitivity and specificity is acceptable 5 because of the tradeoff between false-positive and false-negative cases. Moreover, despite the possibility of selection bias, we believe that the size of missing undiagnosed cases in Daegu should be estimated because it is one of most important reasons underlying any seroprevalence study during the epidemic. Currently, however, even a population-based seroprevalence survey with a perfect serological assay may not validly estimate the size of missing undiagnosed cases in Daegu because of antibody loss in many previously infected cases.	./cache/cord-301553-bq8h13np.txt	./txt/cord-301553-bq8h13np.txt