Kislaya, IrinaGómez, VerónicaGarcia, Ana CristinaMachado, AusendaTorres, Ana RitaRoquette, RitaSousa-Uva, MafaldaMatias Dias, CarlosNunes, BaltazarCosta, InêsGonçalves, PauloMatos, RitaMachado, JorgeManita, CarlaMartins, FátimaSantos, Joãode Sousa, RitaSoeiro, SofiaRocha, RaquelRoque, CarlaVerdasca, NunoGuiomar, RaquelRodrigues, Ana PaulaISNCOVID-19 study team2021-03-102021-03-102020-10http://hdl.handle.net/10400.18/7410The objective of this seroepidemiological survey was to estimate seroprevalence of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) specific antibodies (IgM and/or IgG) in Portugal in May-July 2020. The seroprevalence of SARS-Cov-2 infection (positive for IgM and/or IgG) was 2.9% (CI95: 2.0 - 4.2%). Our results support extend limited extent of infection by SARS-CoV-2 in Portugal due to early lockdown measures implementation.engSurveySARS-CoV-2SeroprevalenceSevere Acute Respiratory Syndrome Coronavirus 2COVID-19Inquérito Serológico Nacional COVID-19ISN-COVID-19Infecções RespiratóriasEstados de Saúde e de DoençaPortugalconference object