Call (and pay for that person's cab ride home, or drive that person's car home and then call yourself a cab back to the job or the party.) When a person is feeling low, a little kindness from someone who has just accused that person of carrying horrific germs should go a long way toward forgiveness.

CNN: Commentary: Etiquette and the flu

"He was a little angel and touched all our hearts with his kindness, we shall all miss him dearly, " she said.

BBC: Sara Ege: Life jail for son's murder over Koran studies