WONGBOONNAK, R. Effectiveness of COVID-19 Vaccine Three Doses in Mortality Reduction among COVID-19 Infected Elderly in Samut Prakan Province. Journal of Health Systems Research, Nonthaburi, Thailand, v. 17, n. 2, p. 364–71, 2023. Disponível em: https://he04.tci-thaijo.org/index.php/j_hsr/article/view/3180. Acesso em: 21 jun. 2025.