UV light can completely inactivate Coronavirus in 9 minutes. Far-UVC light can kill 99.9% coronaviruses in air and surfaces.

UV-b exposure can increase vitamin D in the body, which is necessary for a proper immune system. It would not kill it in your body, but it will give your body the necessary ammunition to control the infection. Luckily, coronavirus is not the killervirus we thought it would be and most of the times, in somewhat healthy individuals, boosting the immunesystem is a good treatment.