@article{moraes_raposo_2025, title={Impact of vaccination and SARS-CoV-2 variants on severe COVID-19 outcomes: a cross-sectional study, Brazil, 2021-2022}, volume={34}, ISSN={2237-9622}, url={https://doi.org/10.1590/S2237-96222025v34e20240613.en}, DOI={10.1590/S2237-96222025v34e20240613.en}, journal={Epidemiologia e Serviços de Saúde}, publisher={Secretaria de Vigilância em Saúde e Ambiente - Ministério da Saúde do Brasil}, author={Moraes, Luiza Paiva and Raposo, Letícia Martins}, year={2025}, pages={e20240613} }