NJBCS, Author. Diphtheria Outbreak During Covid-19 Pandemic in Katsina, North-Western Nigeria. Nigerian Journal of Basic and Clinical Sciences, Nigeria, v. 19, n. 1, 2026. DOI: 10.65843/wd552x86. Disponível em: https://njbcs.ng/index.php/njbcs/article/view/1197. Acesso em: 1 may. 2026.