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Published on: June 30, 2023
SARS-CoV-2 infection prevalence and associated factors: a serial population-based study in Espírito Santo, Brazil,
Orlei Amaral Cardoso1, Cristiana Costa Gomes1, Crispim Cerutti Junior2
1Secretaria de Estado da Saúde do Espírito Santo, Subsecretaria de Estado de Vigilância em Saúde, Vitória, ES, Brasil.
Objective:
To analyze SARS-CoV-2 seroprevalence and association of sociodemographic and clinical aspects in the state of Espírito Santo, Brazil.
Methods:
This was a serial cross-sectional study carried out in four phases, using households as the unit of analysis, from May to June 2020. Eleven municipalities were surveyed, with a sample of 4,500 households in each phase.
Results:
Prevalence ranged from 2.1% (95%CI 1.7;2.5) on May 10 (first phase) to 9.6% (95%CI 8.8;10.4) on June 21 (fourth phase). In the Greater Vitória Metropolitan Region, the prevalence were 2.7% (95%CI 2.2;3.3) in the first phase, and 11.5% (95%CI 10.5;12.6) in the fourth phase; in the interior region of the state, prevalence ranged from 0.4% (95%CI 0.1;0.9) to 4.4% (95%CI 3.2;5.5) between the two phases.
Conclusion:
The increase in SARS-CoV-2 seroprevalence found in the fourth phase highlighted the high transmission of the virus, information that can support management of the pandemic.
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