Mesenburg, Marilia Arndt, Pedro Curi Hallal, Ana Maria Baptista Menezes, Aluísio J D Barros, Bernardo Lessa Hortah, Fernando Pires Hartwig, Nadege Jacques, et al. “Prevalence of Symptoms of COVID-19 in the State of Rio Grande Do Sul: Results of a Population-Based Study With 18,000 Participants”. Revista de Saúde Pública 55 (November 22, 2021): 82. Accessed May 2, 2024. https://www.revistas.usp.br/rsp/article/view/193670.