Protective Effect of Surgical Masks versus N95 Respirator in Prevention of SARS-CoV-2 Contami-nation in Healthcare Professionals: Systematic Re-view Protocol . Principles and Practice of Clinical Research, [S. l.], v. 8, n. 3, p. 10–18, 2022. DOI: 10.21801/ppcrj.2022.83.4. Disponível em: https://journal.ppcr.org/index.php/ppcrjournal/article/view/162.. Acesso em: 3 jul. 2024.