What the Center for Disease Control in the US has to say (as of today):
Wash your hands often with soap and water. If soap and water are not available, use analcohol-based hand sanitizer.
Avoid touching your eyes, nose, and mouth. Germs spread this way.
Avoid close contact with sick people.
Be sure you are up-to-date with all of your shots, and if possible, see your healthcare provider at least 4–6 weeks before travel to get any additional shots. Visit CDC’s Travelers' Health website for more information on healthy travel.
If you are sick
Cover your mouth with a tissue when you cough or sneeze, and throw the tissue in the trash.
Avoid contact with other people to keep from infecting them.