1. Pathogens Causing Upper Respiratory Tract Infections in Outpatients
2. Respiratory Virus Infections: Understanding COVID-19
3. Korea Disease Control and Prevention Agency (KDCA). Infectious disease homepage: legal infectious diseases (by grade). Available from: https://npt.kdca.go.kr/npt/biz/npp/portal/nppLwcrIcdMain.do. Accessed Dec 1, 2022.
4. World Health Organization (WHO). Coronavirus disease (COVID-19) pandemic. Available from: https://www.who.int/emergencies/diseases/novel-coronavirus-2019. Accessed Dec 1, 2022.
5. Self-efficacy mechanism in human agency.