It’s also useful to remind you that you’ve been somewhere “contaminated” and to keep your finger out of your face, if you’re taking it off correctly and keeping it somewhere “contaminated” in your vehicle or when home, and decontaminating yourself at that location after removal.
The nurse here removes hers face side down to a specific spot on her dashboard in the sunlight (assuming sunlight helps break the little nasty down but knowing her windows block the really useful UV-C anyway) and it stays there. She then wipes down interior of vehicle and herself along with reaching outside and wiping the door handle she just used to get in.
Overkill and not 100% correct since she’s usually still in her work scrubs, but she at least has a routine. I also don’t get in her vehicle right now for much of anything. I backed it out the other night to swap vehicles around for a freak midnight hail storm and didn’t die. LOL.
She uses gloves on stuff like gas pumps and shopping carts and those go in trash before entering the vehicle. Of course.
But the mask as an indicator not to do something stupid to yourself is fairly useful if you’re a cross-contamination dummy in training.