Even if you don’t include farm workers urinating and defecating in the fields, or contamination from animal agriculture (a lot of North American farms don’t farm animals along side their crops anymore) A lot of it is naturally on the plants or the grains. There’s bacteria and viruses everywhere. I’m saying eliminating meat from your diet isn’t going to stop us all getting sick. Birds, rodents, and bats and insects all still shit on our produce.