“If I’m not mistaken, I think it’s suggesting that small exposure to the virus rather than prolonged contact allows the body to develop antibodies without getting severely ill.”
That is well known. Basis of vaccines.
Up til now it's all been 'watch out for that aerosolized covid!'
This would suggest breathing in a little Covid air, but not air full of droplets, is a good thing. That's my point. That you'd be wise to walk through a hospital, but certainly not french kiss a covid patient, and that walking through a hospital now is smarter than avoiding such things.
Until now, I had not heard that specifically expressed.
For example, this was not a good way to try to vaccinate oneself against polio.