UVC is very effective! I totally agree. And again Germs do not know the difference between Far Uvc And Just Uvc. Once again we agree! The Human though definatly knows the difference between Far Uvc and Just Uvc . Far Uvc is safe for humans and Uvc IS NOT! But to be effective the Virus needs to be killed as soon as it leaves OUR BODY, Not later on, when maybe someone is carring a device that kills it ,or maybe not!