Papwijitsil, Ratchadaporn, Paphanij Suangtho, Rungrot Jaiyong, Sirima Thananun, Kalita Wareewanit, Tipamas Angthong, and Pawinee Doung-ngern. 2020. “An Investigation of Coronavirus Disease (COVID-19) in a Chinese Tourist, January-February 2020: Surgical Mask Wearing in Pre-Physical Distancing Strategy”. Outbreak, Surveillance, Investigation & Response (OSIR) Journal 13 (2):55-63. https://doi.org/10.59096/osir.v13i2.262820.