Right. After having Covid in April 2020 I developed what appears to be a hypersensitivity to Covid, where I get an allergic reaction when exposed within about 20-30 minutes. It's not pleasant, but I guess you could say I'm a human detector similar to what dogs have been trained for. I can assert that surgical, N-95, and KN95 are not completely effective in my experiences. P-100 masks however have been basically full proof so far. They have been a goto despite being expensive. They can be covered with cloth If you think they look dorky. Another antictode is that there are a lot of weak viral shedders with little or no symptoms out there. During some of the bad months I've inferred it must be around 1/5 to 1/10 people.