I was wearing a 3m respirator with p100 cartridges.
One because the paper masks were hard to find, two they reduce but do not eliminate the risk of infection, and three those cartridges last way longer.
Never caught it either.
You have and are doing the right thing to protect your health against a virus where about 250,000 medical papers all show is very bad news for humans.
I know people who never had symptoms, but tested because a household member had tested positive (with symptoms) and found out they were positive too - it happens.
In my opinion, that is the best case scenario - you got it, didn't know it and your body fought it off like a champ.
Definitely true. But there are some people who have been very careful and/or tested multiple times with every illness in the last 4 years, and who are fairly certain they have not had COVID.