Prevalence of SARS-CoV-2 Antibodies after First 6 Months of COVID-19 Pandemic, Portugal
Luísa Canto e Castro, Ana Helena Guia Pereira, Rita Ribeiro, Catarina Alves, Luís Veloso, Vera Vicente, Dalila Alves, Inês Domingues, Cláudia Silva, Andreia Gomes, Marta Serrano, Ângela Afonso, Marc Veldhoen, Maria José Rego de Sousa, José Germano Rego de Sousa, Germano de Sousa, Maria M. Mota, Bruno Silva-Santos1
, and Ruy M. Ribeiro1
Author affiliations: Fundação Francisco Manuel dos Santos, Lisbon, Portugal (L. Canto e Castro); Universidade de Lisboa, Lisbon (L. Canto e Castro, I. Domingues, C. Silva, A. Gomes, M. Serrano, Â. Afonso, M. Veldhoen, M.M. Mota, B. Silva-Santos, R.M. Ribeiro); Centro de Medicina Laboratorial Germano de Sousa, Lisbon (A.H.G. Pereira, R. Ribeiro, M.J. Rego de Sousa, J.G. Rego de Sousa, G. de Sousa); CTI Clinical Trial and Consulting Services, Portugal (C. Alves, L. Veloso, V. Vicente, D. Alves); Los Alamos National Laboratory, Los Alamos, New Mexico, USA (R.M. Ribeiro)
Figure 1. Seroprevalence of antibodies against severe acute respiratory syndrome coronavirus 2, Portugal, compared with official reported confirmed cases, by sex and age. A) Female; B) male. Adjusted seroprevalence measured in this study (numbers above light gray bars) is compared with confirmed cases (numbers above dark gray bars) as a fraction of the corresponding population group (on September 1, 2020). Error bars indicate 95% CIs for estimates. This figure includes different age ranges for consistency with the official data on number of cases by age.
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