Masks

One question that needs to be asked, why are the hospitals going through so many masks. My wife is a retired nurse with working 30 plus years in all various aspects of patient care. She told me if they are disposing masks after each use they are being wasted. The hospitals that she worked at had policies that one mask per person was needed per shift. Even in the cases where she took care of people in isolation. Only time a mask was changed if it was soiled. I can see changing a mask if a patient were to cough or sneeze in your face. Also, a mask can be sanitized by merely wiping with a sanitized wipe.