Novel coronavirus pneumonia is mainly spread by droplet and contact, so the most important measure to prevent novel coronavirus pneumonia is to wear a mask when going to crowded places, but you must master the correct way to wear it. If you feel uncomfortable, you should also wear a mask to protect others. The next step is to wash your hands regularly, especially before and after meals and after going home, to avoid contact transmission. In addition, strengthening exercise and improving your immune system are also important measures to avoid being infected. The current epidemic situation is serious, the state advocates less going out, staying at home and wearing a mask when going out is the most important initiative to prevent infection at the moment.