Atsawawaranunt, K., R. Yorsaeng, and V. Pawun. “A Case Report of Recurrent SARS-CoV-2 RNA Positivity After COVID-19: Challenges to Differentiate from Reactivation and Reinfection: A Case Report of Recurrent SARS-CoV-2 RNA Positivity”. INSTITUTE FOR URBAN DISEASE CONTROL AND PREVENTION JOURNAL, vol. 6, no. 2, Feb. 2022, pp. 65-70, https://he01.tci-thaijo.org/index.php/iudcJ/article/view/250979.