SARS-Cov-2 seroprevalence and risk factors among health care workers: Estimating the risk of COVID-19 dedicated units

Maura Salaroli de Oliveira; Renata Desordi Lobo; Felippe Pires Detta; José Mauro Vieira-Junior; Thiago Lucas de Souza Castro; Daniella Bosco Zambelli; Luiz Francisco Cardoso; Igor Carmo Borges; Tânia Regina Tozetto-Mendoza; Silvia Figueiredo Costa; Maria Cassia Mendes-Correa

doi:10.1016/j.ajic.2021.03.010

SARS-Cov-2 seroprevalence and risk factors among health care workers: Estimating the risk of COVID-19 dedicated units

Am J Infect Control. 2021 Sep;49(9):1197-1199. doi: 10.1016/j.ajic.2021.03.010. Epub 2021 Mar 24.

Affiliations

¹ Department of Infection Control, Hospital Sírio Libanês, São Paulo, Brazil; Department of Infection Control, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo. Electronic address: masoliveira@hsl.org.br.
² Department of Infection Control, Hospital Sírio Libanês, São Paulo, Brazil.
³ Institute of Quality and Safety of Hospital Sírio Libanês, São Paulo, Brazil.
⁴ Hospital Sírio Libanês, São Paulo, Brazil.
⁵ Department of Infectious Diseases, Laboratório de Investigação Médica - LIM 49 (Bacteriology) and LIM-52 (Virology), Instituto de Medicina Tropical, University of São Paulo, Brazil.

Abstract

We evaluated the seroprevalence of SARS-CoV-2 and risk factors among 1,996 oligo/asymptomatic health care workers. The seroprevalence was 5.5% and risk factors associated with being infected with SARS-CoV-2 was professional category of cleaning (adj odds ratio 2.22, 95% confidence interval: 1.12-4.44, P: .023) and male gender (adj odds ratio: 1.54, 95% confidence interval: 1.03-2.32, P: .035).Working at dedicated COVID-19 units (high-risk group) was not an independent risk factor for seropositivity.

Keywords: Community transmission; Occupational risk; Serology.

MeSH terms

COVID-19*
Health Personnel
Humans
Male
Risk Factors
SARS-CoV-2*
Seroepidemiologic Studies