S. Thanasitthichai, A. Thaiyakul, สง่า ณ., Y. Poovorawan, S. Kwanjaroensub, and P. Yingin, “Viral Infectivity of Asymptomatic or Mild Symptomatic without Risk Factors COVID-19 Case-patients at 7 and 10 Days after Diagnosis”, J DMS, vol. 47, no. 2, pp. 13–21, Jun. 2022.