@article{barros_victora_menezes_horta_barros_hartwig_victora_vidaletti_silveira_mesenburg_et al._2021,  title={Population-level seropositivity trend for SARS-Cov-2 in Rio Grande do Sul, Brazil},  volume={55},  ISSN={0034-8910},  url={https://doi.org/10.11606/s1518-8787.2021055004075},  DOI={10.11606/s1518-8787.2021055004075},  journal={Revista de Saúde Pública},  publisher={Faculdade de Saúde Pública da Universidade de São Paulo},  author={Barros, Aluísio J D and Victora, Cesar G and Menezes, Ana M B and Horta, Bernardo L and Barros, Fernando C and Hartwig, Fernando P and Victora, Gabriel D and Vidaletti, Luis Paulo and Silveira, Mariângela F and Mesenburg, Marilia A and Jacques, Nadège and Struchiner, Cláudio J and Brust, Flávia Roberta and Dall’Agnol, Marinel M and Delamare, Ana Paula Longaray and François, Carlos Henrique R and Ikeda, Maria Letícia R and Pellegrini, Débora C P and Reuter, Cézane Priscila and Silva, Shana G da and Dellagostin, Odir A and Hallal, Pedro C},  year={2021},  pages={78} }