HASSAN, Taimoor. What we need to know about the Delta variant. Pakistan Armed Forces Medical Journal, [S. l.], v. 72, n. 2, p. 727, 2022. DOI: 10.51253/pafmj.v72i2.7088. Disponível em: https://www.pafmj.org/PAFMJ/article/view/7088. Acesso em: 8 may. 2024.