You shouldn't hug someone without their permission.
Bill is walking down the street when he sees his cousin who, unbeknownst to Bill, was recently diagnosed with Covid.
Bill wants to show his cousin how happy he is to see him.
Bill runs to his cousin but stops 6 feet away from him and tells him how great it is to see him.
Bill happily runs to his cousin and without asking, hugs him.
Bill stays healthy.
Bill is contaminated with Covid.