1. Hong Kong Cathay Pacific lost 869 billion won last year due to COVID-19;Kim,2022
2. COVID-19 updated impact assessment,2020
3. International travel requirements and recommendations,2022
4. More than 10,000 Korean tourists visited Saipan after the travel bubble;Sung,2022
5. The influence of risk perception of COVID-19 and travel involvement on overseas travel intention in post-Corona era: expanding on the theory of planned behavior;Lee;J. Tourism Manag. Res.,2021