1.
Wongboonnak R. Effectiveness of COVID-19 Vaccine Three Doses in Mortality Reduction among COVID-19 Infected Elderly in Samut Prakan Province. J Health Syst Res [internet]. 2023 Jun. 29 [cited 2025 Sep. 12];17(2):364-71. available from: https://he04.tci-thaijo.org/index.php/j_hsr/article/view/3180