You shouldn't spread your germs in publicly used things.
Jordan is at home sick this weekend.
Jordan wants to go get some medicine.
Jordan makes sure to wear a mask and gloves before he heads out to the pharmacy and only sneezes into his sleeve.
Jordan heads to his local pharmacy without a mask or gloves on.
Thanks to Jordans precautions the next customer to enter does not get sick.
He opens the pharmacy door after sneezing into his hand, subsequently, the next customer opens the door bare handed and gets sick because of it.