“Let’s first take a little review of the Principles of Hand Hygiene that are endorsed by the AMA and the AAFP:

1. Wash your hands when they are dirty and before eating;
2. Do not cough into your hands;
3. Do not sneeze into your hands;
4. Above all, do not put your hands into your eyes, ears, and mouth.

S.C. Johnson Professional (debmed.com)