Introduction: Estimates of the number of individuals infected by severe acute respiratory syndrome coronavirus 2 are important for health planning and establishment of expectations regarding herd immunity. Methods: Seven testing rounds of a serological survey were conducted at 1-week intervals between April 19 and May 31, 2020 in Teresina municipality. Results: Over the 7 weeks, serological positivity increased from 0.56% (95% confidence interval [CI]: 0.18%–1.30%) to 8.33% (95% CI: 6.61%–10.33%), representing 33–53 persons infected for each reported case. Conclusions: Serological screening may be an important tool for understanding the immunity of a population and planning community interventions.
CITATION STYLE
Vieira, M. A. da C. e.Silva, Vieira, C. P. de B., Borba, A. de S., Melo, M. C. de C., Oliveira, M. de S., Melo, R. M., … Aguiar, Y. A. de. (2020). Sequential serological surveys in the early stages of the coronavirus disease epidemic: Limitations and perspectives. Revista Da Sociedade Brasileira de Medicina Tropical, 53, 1–4. https://doi.org/10.1590/0037-8682-0351-2020
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