Comorbidities increase the risk of severity and mortality in COVID-19 patients: a systematic review and meta-analysis . Research, Society and Development, [S. l.], v. 10, n. 2, p. e50010212533, 2021. DOI: 10.33448/rsd-v10i2.12533. Disponível em: https://rsdjournal.org/rsd/article/view/12533. Acesso em: 5 dec. 2025.