TY - JOUR AU - Canto e Castro, Luísa AU - Pereira, Ana Helena Guia AU - Ribeiro, Rita AU - Alves, Catarina AU - Veloso, Luís AU - Vicente, Vera AU - Alves, Dalila AU - Domingues, Inês AU - Silva, Cláudia AU - Gomes, Andreia AU - Serrano, Marta AU - Afonso, Ângela AU - Veldhoen, Marc AU - de Sousa, Maria José Rego AU - de Sousa, José Germano Rego AU - de Sousa, Germano AU - Mota, Maria AU - Silva-Santos, Bruno AU - Ribeiro, Ruy T1 - Prevalence of SARS-CoV-2 Antibodies after First 6 Months of COVID-19 Pandemic, Portugal T2 - Emerging Infectious Disease journal PY - 2021 VL - 27 IS - 11 SP - 2878 SN - 1080-6059 AB - In September 2020, we tested 13,398 persons in Portugal for antibodies against severe acute respiratory syndrome coronavirus 2 by using a quota sample stratified by age and population density. We found a seroprevalence of 2.2%, 3–4 times larger than the official number of cases at the end of the first wave of the pandemic. KW - coronavirus disease KW - COVID-19 KW - pandemic KW - severe acute respiratory syndrome coronavirus 2 KW - SARS-CoV-2 KW - coronaviruses KW - viruses KW - respiratory infections KW - population prevalence KW - seroepidemiology KW - antibodies KW - zoonoses KW - Portugal DO - 10.3201/eid2711.210636 UR - https://wwwnc.cdc.gov/eid/article/27/11/21-0636_article ER - End of Reference