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Title: Prevalence of SARS-CoV-2 Antibodies after First 6 Months of COVID-19 Pandemic, Portugal

Abstract

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.

Authors:
 [1];  [2];  [2];  [3];  [3];  [3];  [3];  [4];  [4];  [4];  [4];  [4];  [4];  [2];  [2];  [2];  [4];  [4];  [5]
+ Show Author Affiliations
  1. Fundação Francisco Manuel dos Santos, Lisbon (Portugal); Univ. of Lisbon (Portugal)
  2. Centro de Medicina Laboratorial Germano de Sousa, Lisbon (Portugal)
  3. CTI Clinical Trial and Consulting Services, Lisbon (Portugal)
  4. Univ. of Lisbon (Portugal)
  5. Univ. of Lisbon (Portugal); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program; Fundacao para a Ciencia e Tecnologia; European Commission (EC)
OSTI Identifier:
1829648
Report Number(s):
LA-UR-21-22054
Journal ID: ISSN 1080-6040
Grant/Contract Number:  
89233218CNA000001; 20210730ER; PTDC/MAT-APL/31602/2017; UID/MAT/00006/2019; 952377; 667824
Resource Type:
Accepted Manuscript
Journal Name:
Emerging Infectious Diseases
Additional Journal Information:
Journal Volume: 27; Journal Issue: 11; Journal ID: ISSN 1080-6040
Publisher:
Centers for Disease Control and Prevention
Country of Publication:
United States
Language:
English
Subject:
60 APPLIED LIFE SCIENCES

Citation Formats

Canto e Castro, Luísa, Pereira, Ana Helena Guia, Ribeiro, Rita, Alves, Catarina, Veloso, Luís, Vicente, Vera, Alves, Dalila, Domingues, Inês, Silva, Cláudia, Gomes, Andreia, Serrano, Marta, Afonso, Ângela, Veldhoen, Marc, de Sousa, Maria José Rego, de Sousa, José Germano Rego, de Sousa, Germano, Mota, Maria M., Silva-Santos, Bruno, and Ribeiro, Ruy M. Prevalence of SARS-CoV-2 Antibodies after First 6 Months of COVID-19 Pandemic, Portugal. United States: N. p., 2021. Web. doi:10.3201/eid2711.210636.
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Canto e Castro, Luísa, Pereira, Ana Helena Guia, Ribeiro, Rita, Alves, Catarina, Veloso, Luís, Vicente, Vera, Alves, Dalila, Domingues, Inês, Silva, Cláudia, Gomes, Andreia, Serrano, Marta, Afonso, Ângela, Veldhoen, Marc, de Sousa, Maria José Rego, de Sousa, José Germano Rego, de Sousa, Germano, Mota, Maria M., Silva-Santos, Bruno, & Ribeiro, Ruy M. Prevalence of SARS-CoV-2 Antibodies after First 6 Months of COVID-19 Pandemic, Portugal. United States. https://doi.org/10.3201/eid2711.210636
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Canto e Castro, Luísa, Pereira, Ana Helena Guia, Ribeiro, Rita, Alves, Catarina, Veloso, Luís, Vicente, Vera, Alves, Dalila, Domingues, Inês, Silva, Cláudia, Gomes, Andreia, Serrano, Marta, Afonso, Ângela, Veldhoen, Marc, de Sousa, Maria José Rego, de Sousa, José Germano Rego, de Sousa, Germano, Mota, Maria M., Silva-Santos, Bruno, and Ribeiro, Ruy M. Thu . "Prevalence of SARS-CoV-2 Antibodies after First 6 Months of COVID-19 Pandemic, Portugal". United States. https://doi.org/10.3201/eid2711.210636. https://www.osti.gov/servlets/purl/1829648.
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@article{osti_1829648,
title = {Prevalence of SARS-CoV-2 Antibodies after First 6 Months of COVID-19 Pandemic, Portugal},
author = {Canto e Castro, Luísa and Pereira, Ana Helena Guia and Ribeiro, Rita and Alves, Catarina and Veloso, Luís and Vicente, Vera and Alves, Dalila and Domingues, Inês and Silva, Cláudia and Gomes, Andreia and Serrano, Marta and Afonso, Ângela and Veldhoen, Marc and de Sousa, Maria José Rego and de Sousa, José Germano Rego and de Sousa, Germano and Mota, Maria M. and Silva-Santos, Bruno and Ribeiro, Ruy M.},
abstractNote = {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.},
doi = {10.3201/eid2711.210636},
journal = {Emerging Infectious Diseases},
number = 11,
volume = 27,
place = {United States},
year = {Thu Aug 26 00:00:00 EDT 2021},
month = {Thu Aug 26 00:00:00 EDT 2021}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.3201/eid2711.210636
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Works referenced in this record:

Asymptomatic SARS-CoV-2 Carriers: A Systematic Review and Meta-Analysis
journal, January 2021

Performance characteristics of five immunoassays for SARS-CoV-2: a head-to-head benchmark comparison
journal, December 2020

Seroprevalence of anti‐SARS‐CoV‐2 antibodies in COVID‐19 patients and healthy volunteers up to 6 months post disease onset
journal, November 2020

  • Figueiredo‐Campos, Patrícia; Blankenhaus, Birte; Mota, Catarina
  • European Journal of Immunology, Vol. 50, Issue 12
  • DOI: 10.1002/eji.202048970

Excess Mortality Estimation During the COVID-19 Pandemic: Preliminary Data from Portugal
journal, June 2020

  • Nogueira, Paulo Jorge; De Araújo Nobre, Miguel; Nicola, Paulo Jorge
  • Acta Médica Portuguesa, Vol. 33, Issue 6
  • DOI: 10.20344/amp.13928

SARS-CoV-2 antibody prevalence in Brazil: results from two successive nationwide serological household surveys
journal, November 2020

High COVID-19 testing rate in Portugal
journal, July 2020

A rapid review and meta-analysis of the asymptomatic proportion of PCR-confirmed SARS-CoV-2 infections in community settings
journal, January 2020

Estimating the Cumulative Incidence of SARS-CoV-2 Infection and the Infection Fatality Ratio in Light of Waning Antibodies
journal, January 2021

Seroprevalence of SARS-CoV-2 Infection in Portugal in May-July 2020: Results of the First National Serological Survey (ISNCOVID-19)
journal, February 2021

  • Kislaya, Irina; Gonçalves, Paulo; Barreto, Marta
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  • DOI: 10.20344/amp.15122

Infection fatality risk for SARS-CoV-2 in community dwelling population of Spain: nationwide seroepidemiological study
journal, November 2020

  • Pastor-Barriuso, Roberto; Pérez-Gómez, Beatriz; Hernán, Miguel A.
  • BMJ
  • DOI: 10.1136/bmj.m4509

Humoral Immune Response to SARS-CoV-2 in Iceland
journal, October 2020

  • Gudbjartsson, Daniel F.; Norddahl, Gudmundur L.; Melsted, Pall
  • New England Journal of Medicine, Vol. 383, Issue 18
  • DOI: 10.1056/NEJMoa2026116

Prevalence of SARS-CoV-2 in Spain (ENE-COVID): a nationwide, population-based seroepidemiological study
journal, August 2020

Estimating Prevalence from the Results of a Screening test
journal, January 1978

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