COVID-19 seroprevalence in military police force, Southern Brazil.
BackgroundLimited data is available regarding the frequency of COVID-19 in populations that are highly exposed to SARS-CoV-2.In this cross-section study we evaluated COVID-19 seroprevalence in military police forces of 10 major cities in Rio Grande do Sul, South of Brazil.MethodsSampling was randomly performed in clusters, in respect to the number