JACOBSON, B; KHAN, A; SHULMAN, AH; SEGAL, B; MAYNE, E; BEKKER, L-G; SANNE, I; GRAY, G. Heterologous vaccination of BNT162b2 in Ad26. COV2.S-vaccinated healthcare workers elicits long-term humoral immune response. South African Medical Journal, South Africa, v. 112, n. 10, p. 828–837, 2022. DOI: 10.7196/SAMJ.2022.v112.i11.16614. Disponível em: https://samajournals.co.za/index.php/samj/article/view/184. Acesso em: 7 oct. 2025.