What Is the Risk of Developing a Severe Form of COVID-19 Infection Among Adults Who Currently Smoke Compared to Ex-smokers? Protocol for a Systematic Review and Meta-analysis. IPS Journal of Public Health, [S. l.], v. 5, n. 4, p. 515–518, 2025. DOI: 10.54117/evs27729. Disponível em: https://journals.ipsintelligentsia.com/public-health/index.php/ijph/article/view/90. Acesso em: 3 jun. 2026.