โรจนพิทยากร วิวัฒน์. “100 Million Doses of COVID-19 Vaccination and the 2 Years of the Epidemic”. Journal of Health Science of Thailand 30, no. 6 (January 6, 2022): 971–972. Accessed November 19, 2024. https://thaidj.org/index.php/JHS/article/view/11558.