If you suspect that you are infected with novel coronavirus first of all, do not go to crowded places, wear a mask, keep a good distance from your family, pay attention to ventilation, pay attention to personal hygiene, and go to the fever clinic of the nearest sentinel hospital. Take the initiative to tell the doctor who you have been in contact with and cooperate with him/her in the investigation. If you are active in an open environment around your home, just change your clothes, remove your mask and wash your hands normally when you return home. The pathogens of respiratory-related diseases are mainly spread by droplets, with a transmission range of about 1 meter. Wear a mask when you go out, cover your nose and mouth with a tissue when you sneeze or cough, wash your hands and change your clothes in time to meet the protection requirements, and there is no need to panic too much. If you return home from a crowded place, such as a train station or hospital, it is recommended that you disinfect your clothes. If the clothes are not contaminated by pollutants, spray the whole body with 75% alcohol, and then dry to the balcony ventilation. If contaminated by pollutants, use 500mg/L chlorine disinfectant for 30min, then wash and dry with water.