Sawangsrisutikul, Kanokkarn, Teerasak Chuxnum, Pitiphon Promduangsi, Nipapan Saritapirak, & Rapeepong Suphanchaimat. "Risk Factors of COVID-19 Infection and the Effectiveness of Pre-flight Screening from an Investigation of an International Flight to Thailand, 2020." OSIR Journal [Online], 16.1 (2023): n. pag. Web. 25 Apr. 2024