I had a buddy here in the Bay Area who worked as a gas station attendant in HS out at the edge of the central valley. Lowest guy on the totem pole - it meant he was also responsible for keeping the bathrooms clean. He had PTSD from cherry season, when masses of people from the suburbs would hit the farmland to pick cherries and buy them on the side of the road, of course eating their fair share ...
TMI but I would have been in an orchard. I haven't been out much, only outdoors stuff, I have not been to a public bathroom for a year. There is some risk with air born particles from feces and the small space. If a guy was breathing heavy in a small bathroom for 10 minutes and dropped / flushed a deuce right before you walk in, you may have some risk. The bigger the bathroom and less usage, the better.
G