Some herbal medicines have in vitro inhibitory effect on novel coronavirus, but it cannot be proved that it can effectively prevent novel coronavirus. The effective prevention method is still to adjust individual behavior: 1. Avoid going to areas with high incidence of epidemics and crowded places. 2. Always wear a mask when going out. 3. Enhance air circulation and disinfection in the home environment. 4. Wash your hands regularly, using soap and running water or hand sanitizer. 5.If you have fever, cough, shortness of breath and other symptoms of respiratory infection, wear a mask and go to the designated hospital in each area.