A Nepalese police officer walks at the Tribhuvan International Airport amid the COVID-19 pandemic in Kathmandu, Nepal, on May 31, 2020. (Photo by Sulav Shrestha/Xinhua)

Security personnel wearing protective gear are seen at the Tribhuvan International Airport amid the COVID-19 pandemic in Kathmandu, Nepal, on May 31, 2020. (Photo by Sulav Shrestha/Xinhua)

A woman cleans the floor at the Tribhuvan International Airport amid the COVID-19 pandemic in Kathmandu, Nepal, on May 31, 2020. (Photo by Sulav Shrestha/Xinhua)