Sunan, K., K. Pongpirul, T. Rattananupong, P. Phutrakool, and M. Suphannaphong. “Breakthrough COVID-19 infections, Hospitalization, and Mortality after Two CoronaVac shots at Thailand CVC”. Journal of The Department of Medical Services, vol. 49, no. 3, Sept. 2024, pp. 126-35, https://he02.tci-thaijo.org/index.php/JDMS/article/view/267160.