KHAN, H.; MASOOD, A. Statistics of Viral Infectivity in Close Contacts with Covid-19 Patients: A Joint Hospital and Community Adventure in District Nowshera of Pakistan. Pakistan Journal of Public Health, [S. l.], v. 10, n. 2, p. 103-107, 2021. DOI: 10.32413/pjph.v10i2.553. Disponível em: https://pjph.org/index.php/pjph/article/view/553. Acesso em: 18 apr. 2021.