REHMAN, Sana; MUNIR, Muhammad Kashif; SAEED, Saqib; AFTAB, Ayesha; HANIF, Asif. Frequency of Re-infection and Severity of Symptoms among COVID-19 PCR Confirmed Patients. Pakistan Journal of Medical Research, [S. l.], v. 62, n. 4, p. 142–147, 2024. Disponível em: https://www.pjmr.org.pk/index.php/pjmr/article/view/453. Acesso em: 13 nov. 2026.