Well here is my problem with this whole thing. I saw a medical study that was done on shopping carts at your local store. 72% had fecal matter on the handles from poor bathroom practices. So if the general population can not wipe there ass correctly and wash their hands what chance do we have? If you add sneezing and coughing than stores are a good place to die.
And likely you could add to that list: money, gas pump handles, door handles, ATM machines, money, checkout credit card machines, keyboards, touch screens, money, produce and goods on supermarket and store shelves, money, countertops, windows, light switches, all surfaces of bathrooms stalls, ANYTHING that people in a public place are likely to put their hands.
I saw a woman dressed in third world ethnic dress with a head covering, hold her store card in her MOUTH as she unloaded her cart while her useless male counterpart watched her do all the heavy work.
If you want to really get grossed out, just understand that all odor is particulate. Then, think about every surface in a public restroom. I’ve used a paper towel to open the door and leave ever since I was told that.