JOMBO, G.; OBIAGWU, A. Emerging Covid-19 Variants and Vaccine Efficacy? An Eye on the Future. Western Journal of Medical and Biomedical Sciences, [S. l.], v. 2, n. 2, p. xxvii-xxxii, 2021. Disponível em: https://wjmbs.com.ng/index.php/wjmbs/article/view/58. Acesso em: 14 may. 2024.