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0065/2020 - Trends in the prevalence of COVID-19 infection in Rio Grande do Sul, Brazil: repeated serological surveys
Evolução da prevalência de infecção por COVID-19 no Rio Grande do Sul: inquéritos sorológicos seriados

Author:

• Pedro C Hallal - Hallal, Pedro C. - <prchallal@gmail.com>
ORCID: https://orcid.org/0000-0003-1470-6461

Co-author(s):

• Bernardo L Horta - Horta, BL - <blhorta@gmail.com>
ORCID: https://orcid.org/0000-0001-9843-412X
• Aluísio J D Barros - Barros, A.J.D - <abarros.epi@gmail.com>
ORCID: https://orcid.org/0000-0002-2022-8729
• Odir A Dellagostin - Dellagostin, OA - <odirad@gmail.com>
ORCID: https://orcid.org/0000-0003-2803-4088
• Fernando P Hartwig - Hartwig, FP - <fernandophartwig@gmail.com>
ORCID: https://orcid.org/0000-0003-3729-0710
• Lúcia C Pellanda - Pellanda, Lúcia C - <lupellanda@gmail.com>
ORCID: https://orcid.org/0000-0002-8776-2248
• Cláudio José Struchiner - Struchiner, C. J. - <claustru@gmail.com>
ORCID: https://orcid.org/0000-0003-2114-847X
• Marcelo N Burattini - Burattini, M.N - <mnburatt@gmail.com>
ORCID: https://orcid.org/0000-0002-5407-6890
• Mariângela Freitas Silveira - Silveira, M. F. - <mariangelafreitassilveira@gmail.com>
ORCID: https://orcid.org/0000-0002-2861-7139
• Ana M B Menezes - Menezes, AMB - <anamene.epi@gmail.com>
ORCID: https://orcid.org/0000-0002-2996-9427
• Fernando C. Barros - Barros, F. C. - <fcbarros.epi@gmail.com>
ORCID: https://orcid.org/0000-0001-5973-1746
• Cesar Gomes Victora - Victora, C. G. - <cvictora@gmail.com>
ORCID: https://orcid.org/0000-0002-2465-2180


Abstract:

COVID-19 is a disease produced by the virus SARS-CoV-2. This virus has spread quickly throughout the world, leading the World Health Organization to first classify COVID-19 as an international health emergency and, subsequently declaring it pandemic. The number of confirmed cases, as April 11, surpassed 1,700,000, but this figure does not reflect the real prevalence of COVID-19 in the population, as in many countries tests are almost exclusively performed in people with symptoms, particularly severe cases. In order to properly assess the magnitude of the problem and to contribute to the design of evidence-based policies for fighting COVID-19, one must accurately estimate the prevalence of infection in the population. This study aims to estimate the prevalence of infected individuals in the state of Rio Grande do Sul, Brazil, to document how fast the infection is spreading, and to estimate the proportion of infected people who present or presented symptoms, as well as the proportion of asymptomatic infections. Four repeated serological surveys will be conducted in probability samples in nine sentinel cities every two weeks, representing all regions of the State. Interviews and tests will be conducted at the participants’ household. A rapid test for the detection of antibodies will be used; the test was validated prior to the beginning of the fieldwork.

Keywords:

COVID-19, infection, prevalence, population-based study, Brazil

Content:

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Cite

Hallal, Pedro C., Horta, BL, Barros, A.J.D, Dellagostin, OA, Hartwig, FP, Pellanda, Lúcia C, Struchiner, C. J., Burattini, M.N, Silveira, M. F., Menezes, AMB, Barros, F. C., Victora, C. G.. Trends in the prevalence of COVID-19 infection in Rio Grande do Sul, Brazil: repeated serological surveys. Cien Saude Colet [periódico na internet] (2020/Apr). [Citado em 05/10/2024]. Está disponível em: http://cienciaesaudecoletiva.com.br/en/articles/trends-in-the-prevalence-of-covid19-infection-in-rio-grande-do-sul-brazil-repeated-serological-surveys/17547?id=17547



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