Then how come we don’t have hundreds of dead surgeons on the floors of operating rooms?
Being a retired Horticulturalist, I have no idea. I have COPD, so maybe that has something to do with my inability to get a solid breathing/exhaling routine. They also wear a very different surgical mask:
https://www.shutterstock.com/image-photo/medical-protective-mask-on-white-background-1643052535