maybe they have and were just one of the peeps who show no sympotoms.
I put 7k miles on my vehicle. Different temperature zones. No symptoms. Plenty of big rigs on the freeway so stuff is moving.
It’s called natural immunity.
Before they started injecting people with an experimental drug, about 80% of us had it through contact with previous corona viruses, including the common cold.
Now, who knows.
Two of my family members were hospitalized with COVID pneumonia last April. My wife was one of them and she takes. HCQ.
My older son and I tested positive but had no symptoms at all. Out of curiosity I had the two of us tested for antibodies a couple months later. They said we had plenty of antibodies to COVID.