The best way to stay healthy is to wash your hands properly and often with soap and water. Washing your hands properly means using soap and water to wash for at least 20 seconds.
If your hands look clean, you can use hand sanitizer with alcohol in it. If they have dirt or food or anything else on them, you should wash them with soap and water because hand sanitizer might not work. If you have to cough or sneeze, try to do it into your elbow or a tissue, then wash your hands afterwards. These things help protect you from the new coronavirus and also from influenza, colds, and other illnesses.