Sontornsuk, Hatairat, and Nongnuan Poolkesorn. “The Coronavirus Disease 2019 Surveillance, Control and Prevention System and Its Impact on the Kamphaeng Phet Province Population”. Journal of Preventive Medicine Association of Thailand 11, no. 1 (May 13, 2021): 13–29. Accessed April 20, 2024. https://he01.tci-thaijo.org/index.php/JPMAT/article/view/249450.