Chanasriyotin, Chayada, Sirinan Junthong, Piyarat Parklug, Kawinyarat Jitaroon, and Naruporn Marukatat. “COVID-19 Infection Rate and Cofactor in Non-Patients under Investigation: Rethinking the COVID-19 Screening Policy: COVID-19 Infection Rate in Non-PUIs”. Vajira Medical Journal : Journal of Urban Medicine 69, no. 4 (August 6, 2025): e274360. accessed September 18, 2026. https://he02.tci-thaijo.org/index.php/VMED/article/view/274360.