It can always be a coincidence, but I would get colds regularly (twice a year at least) and pollen allergy, sometimes severe ones, for decades. Plus some coughi

It can always be a coincidence, but I would get colds regularly (twice a year at least) and pollen allergy, sometimes severe ones, for decades. Plus some coughing and other transmissible sicknesses. That all that has stopped since 2020 at the same time as I started wearing masks and washing my hands very frequently would be an extraordinary coincidence. Even if we exclude 2020 and 2021 as freak years because my interpersonal interactions have been drastically minimized, that still leaves one year and half. I haven't had Covid either, and neither did my partner, and it could also be a coincidence and not related at all to our strict masking and constant ventilation policy, but again that would be an extraordinary coincidence.