Journal: | Revista de saude publica |
Database: | |
System number: | 000535833 |
ISSN: | 0034-8910 |
Authors: | Albuquerque, José Olimpio Moura de1 Kamioka, Gabriela Akemi1 Madalosso, Geraldine1 Costa, Selma Anequini1 Ferreira, Paula Bisordi1 Pino, Francisco Alberto3 Sato, Ana Paula Sayuri2 Carvalho, Ana Carolina Aguiar de1 Amorim, Ana Beatriz Pagliaro1 Aires, Caroline Cotrim1 Kataoka, Ana Paula Arruda Geraldes1 Savani, Elisa San Martin Mouriz1 Bessa, Thirsa Alvares Franco1 Aguiar, Breno Souza de4 Failla, Marcelo Antunes4 Santos, Edson Aparecido dos4 Brito, Edjane Maria Torreão4 Santos, Maria Cristina Honório dos4 Silva, Solange Maria Saboia e1 Caldeira, Luiz Artur Vieira1 Zamarco, Luiz Carlos4 Fonseca, Sandra Maria Sabino4 Lima, Marcia Maria de Cerqueira4 Marques, Ivanilda Argenau4 Silva, Fabiana Érica Vilanova da4 Glasser, Paula Regina1 Burihan, Patrícia Carla Piragibe Ramos1 Cavazzana, Cinthya Luzia1 Mello, Debora Silva de4 Pellini, Alessandra Cristina Guedes4 Nishio, Fernando Yoshiki1 Kian, Fernanda Miyashiro1 Braga, Elza de Santana6 Bertelli, Nilza Maria Piassi6 Fracini, Wagner6 Gonçalves, Marcelo Dell Áquila6 Zular, Paulete Secco6 Piva, Regiane de Santana6 Masi, Eduardo1 |
Institutions: | 1Secretaria Municipal de Saúde, Coordenadoria de Vigilância em Saúde, São Paulo, SP. Brasil 2Universidade de São Paulo, Faculdade de Saúde Pública, São Paulo, São Paulo. Brasil 3Secretaria de Agricultura e Abastecimento, Instituto de Economia Agrícola, São Paulo, SP. Brasil 4Secretaria Municipal de Saúde, São Paulo, SP. Brasil 5Universidade Nove de Julho, Faculdade de Medicina, São Paulo, São Paulo. Brasil 6Secretaria Municipal de Saúde, Coordenadoria Regional de Saúde, São Paulo, SP. Brasil |
Year: | 2021 |
Volumen: | 55 |
Country: | Brasil |
Language: | Inglés |
English abstract | OBJECTIVE To estimate the evolution of the prevalence of SARS-CoV-2 virus infection among residents aged 18 years or over in the municipality of São Paulo. METHODS This is a population-based household survey conducted every 15 days, between June and September 2020, and January and February 2021. In total, the study comprised 11 phases. The presence of antibodies against SARS-CoV-2 was identified in venous blood using a lateral flow test, Wondfo Biotech. In the last phase, the researchers combined it with an immunoenzymatic test, Euroimmun. The participants also answered a semi-structured questionnaire on sociodemographic and economic factors, and on social distancing measures. Prevalence estimates and the 95% confidence interval were estimated according to regions, Human Development Index, sex, age group, ethnicity, education, income, and variables associated with risk or prevention of infection. To compare the frequencies among the categories of each variable, the chi-square test with Rao-Scott correction was used, considering a significance level of 5%. RESULTS In total, 23,397 individuals were interviewed and had their samples collected. The estimated prevalence of antibodies against SARS-CoV-2 ranged from 9.7% (95%CI: 7.9–11.8%) to 25.0% (95%CI: 21.7–28.7). The prevalence of individuals with antibodies against the virus was higher among black and brown people, people with lower schooling and income, and among residents of regions with lower Human Development Index. The lowest prevalences were associated with recommended measures of disease protection. The proportion of asymptomatic infection was 45.1%. CONCLUSION The estimated prevalence of the infection was lower than the cumulative incidence variation, except for the last phase of the study. The differences in prevalence estimates observed among subpopulations showed social inequality as a risk of infection. The lower prevalence observed among those who could follow prevention measures reinforce the need to maintain social distancing measures as a way to prevent SARS-CoV-2 infection. |
Keyword: | Adult, COVID-19, epidemiology, COVID-19 Serological Testing, Health Surveys |
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