I think the rationale was that people would not be passing closely while breathing towards each others' faces.
I never took the shot, but I will say this: One-way aisles sure made shopping a lot easier. Hope they keep it up.
I was more concerned about getting stuck behind someone with virus and getting prolonged exposure, versus the short exposure when passing.
Having to do an extra aisle if you weren’t going the way they wanted was less than ideal.
I already felt like a cow in the TSA lanes. This was more of the same.