Indeed there are multiple variant corona viruses (Sars, Mers, etc) upper respiratory diseases of varying severity.
The common cold is generally a rhinovirus, but mutates enough that effective vaccines don't exist. Big pharma has been trying for half a century to milk that golden cash cow.
I remain optimistic that FarUVc (short wavelength UVc light 222nm) that isn't harmful to humans, but still destroys microbes, could be used to reduce infection spread in public places and hospitals. That is the good news. The bad news is that the only way to make far-UVc now is expensive excimer lasers.
In theory, one could fabricate a cost effective far-UVc LED but so far the experimental LEDs operating at that short wavelength are too low efficiency to be practical.
The world governments spend billions/trillions(?) on R&D... a far-UVc LED technology could pay huge dividends for world health. How do we get that to happen?
JR
PS; It is a little early to worry about this since cost effective far-UVc LEDs are still a wet dream of mine, but if/when they happen, I could almost imagine a world where generations grow up without exposure to common microbes. I'll happily cross that bridge if/when we come to it.