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. 2021 Dec 6;73(11):e3974-e3976.
doi: 10.1093/cid/ciaa1225.

Prevalence of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Asymptomatic Infections in 2 Large Academic Health Systems in Wisconsin

Frida Rivera  1 , Nasia Safdar  2 , Nathan Ledeboer  3 , Grace Schaack  4 , Derrick J Chen  5 , L Silvia Munoz-Price  1
Affiliations

Prevalence of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Asymptomatic Infections in 2 Large Academic Health Systems in Wisconsin

Frida Rivera et al. Clin Infect Dis. .

Abstract

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) asymptomatic infections may play a critical role in disease transmission. We aim to determine the prevalence of asymptomatic SARS-CoV-2 infection at 2 hospital systems in 2 counties in Wisconsin. The SARS-CoV-2 prevalence was 1% or lower at both systems despite the higher incidence of coronavirus disease 2019 (COVID-19) in Milwaukee County.

Keywords: COVID-19; SARS-CoV-2; asymptomatic; n-CoV; novel coronavirus.

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Figures

Figure 1.
Figure 1.
Asymptomatic infections by health system and cumulative cases by county. Bars: percent of asymptomatic infections (pink bars: Froedtert Health; gray bars: University of Wisconsin Health). Lines: cumulative COVID-19 infections (pink line: Milwaukee County; gray line: Dane County) as per the Wisconsin Department of Health Services (https://www.dhs.wisconsin.gov/covid-19/county.htm), Week 1 for Froedtert Health started on 23 April, 2020; week 1 for University of Wisconsin Health started on 5 April, 2020. Abbreviation: COVID-19, coronavirus disease 2019.
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