1) Wash your hands before touching food.
2) Cover your fucking mouth when you cough or sneeze, and wash your hands.
3) If your nose is runny, or you have something in your nose, use a tissue to blow your nose, dispose of the tissue in the trash, and wash your hands.
4) Bathe every day.
5) Never wear the same clothes twice.
Too bad most people are too stupid to practice proper hygene, despite countless reminders, campaigns, and instructions.
A user of 4chan's /a/ board, who, starting October 2010, started writing a story where he was inspired to brush his little sister's teeth after watching Nisemonogatari's infamous toothbrush scene. Eventually, it got to the point that they married and had a child together. He kept posting for about 3 years, until August 2013, when he was never heard from again. Nobody knows if the story is real, but nobody can prove that it's false either.
Aidan: "yo have you heard of that one Oral Hygiene Bro who fucked his sister"
Bob: "Yeah that's some messed up shit"