Cough or sneeze into tissue or your elbow
It keeps the virus off your hands, so you will not spread it to other people and make them sick too.
Why do it?
Turning and covering your nose and mouth with a disposable tissue, or into your elbow, every time you sneeze or cough will catch the droplets and stop them from getting onto your hands.
Throw used tissues in the garbage. If there is no garbage, carry a small plastic bag to put used tissues in and throw out later.