This. No one (that I've seen) is saying you pick it up by walking past someone at a grocery story.
.
In Ann Barnhardt's most recent podcast, there was a woman on there who was experiencing various female-related health problems, who had not been vaccinated, and she speculated that she had gotten it by being around old people in the grocery store when she went shopping. She said that, at the time of day she goes to buy food, most of the other people in the store are old people, the vast majority of whom have been vaccinated, and that was the only time she could think that she might have been in proximity to vaccinated people.
.
I don't know, I'm not a doctor, but that explanation seems far-fetched to me. We'll have to see as more information comes out what is really going on, but I think it's too early now to tell.