Ultraviolet light can kill coronaviruses because viruses are actually very fragile and their must be in a host to survive. Viruses it is possible to survive outside the body for a few hours, whereas bacteria have cell walls and can exist for a long time in various objects, water sources, food, clothing, whereas viruses are very fragile outside the body and are quickly inactivated under certain temperatures, humidity, and ultraviolet light. So you can sunbathe outdoors in a sparsely populated area, which is also a very good way to prevent the new coronavirus. This is because ultraviolet light can kill the airborne coronavirus. In hospitals, by turning the UV light on every night, the coronavirus in the clinic can be killed, which will help and protect the staff and the people. Source: Dr. Yurai