Then they should wash their hands.
How hard is that?
People just don’t need to be spreading crap that dogs get/spread the virus.
It isn’t that the dogs have the virus inside them and are carriers - people that have the virus get it ON the dog (breathing on them, talking to them “Oh aren’t you adorable...” or petting them, and then you are touching and hugging or have the dog in your lap or bed later on.
I just warned my daughter about that (probably too late). They have a lovable pit bull puppy that everyone has to be friends with. And then of course he is all over my daughter later on.