"We had no evidence that masks help and then we found no evidence."
Actually we did from the decades surgeons wore masks to prevent the spread of airborne diseases. Once we knew Covid was one of them, then even if the protection was one way, it would have reduced infections if everyone wore one.
Actually we did from the decades surgeons wore masks to prevent the spread of airborne diseases. Once we knew Covid was one of them, then even if the protection was one way, it would have reduced infections if everyone wore one.