Since I started wearing a mask, I haven't had the flu, a cold, or any kind of communicable disease at all. I normally get everything going by on a breeze. I had two bouts of flu, and a cold between October of 2019 and February of 2020. In fact, I spent most of February sick with the flu, followed by an abscessed tooth, and a return of the flu, thanks to my grandkids. I had two healthy weeks after 6 weeks of yuck, and the 18 months of lockdown.
I've had a cancer scare, and a small heart problem, and allergies up the ying yang, but no colds, flu, or chest infections.