Thanasitthichai, Somchai, Arunee Thaiyakul, สง่า ณัฐธยา, Yong Poovorawan, Suthaluk Kwanjaroensub, and Patchariya Yingin. 2022. “Viral Infectivity of Asymptomatic or Mild Symptomatic without Risk Factors COVID-19 Case-patients at 7 and 10 Days after Diagnosis”. Journal of The Department of Medical Services 47 (2):13-21. https://he02.tci-thaijo.org/index.php/JDMS/article/view/256786.