Those with suspicious symptoms may have fever, cough, sore throat, chest tightness, difficulty breathing, conjunctivitis, etc. Medical surgical masks should be worn when riding in private cars. If the mask is not worn, the driver and other passengers should promptly remind. After a person with suspicious symptoms gets in the car, the car occupants should try to keep a distance from him, the driver should not turn on the air conditioning internal circulation, and open the windows moderately for ventilation. After the suspicious symptom person gets off the car, the driver should quickly open the windows for ventilation and disinfect the surfaces of objects he has touched such as door handles, steering wheels, windows, windshields, seats, etc.