SAEED, Umar et al. Effectivity Analysis of COVID-19 Vaccines Against Emerging Variants of SARS-CoV-2. Archives of Clinical and Biomedical Research, [S. l.], v. 6, n. 1, p. 209–216, 2022. Disponível em: https://fortunejournals.org/ojs/index.php/acbr/article/view/14903. Acesso em: 6 jun. 2026.