If a person moves and stays near the key places where confirmed cases and asymptomatic infected people have stayed, he may have had contact with confirmed cases and asymptomatic infected people, then his health code will turn yellow. However, if you just drive through or pass through a closed area, as long as you don't stop, your health code generally won't change color, so don't worry too much.
Pay attention to personal protection when driving at high speed.
1, long-distance driving, in addition to masks, but also carry disinfection supplies, such as towels. Alcohol disinfection cotton pad, disposable disinfectant or sterile disinfection gel, and vehicles can be disinfected when necessary. Travel long distances, check the condition of vehicles, refuel in advance and prepare drinking water and food. Don't go to the gas station or service area on the way. If you need to go to the bathroom on the way, please wear a mask. After the toilet in the service area comes out, it should be disinfected with portable disinfectant.
2. Properly ventilate in a place with proper windows and ventilation, and be sure to wear a mask. When driving, we can turn on the internal circulation of the air conditioner. Its blocking rate is much better than that of cardiopulmonary bypass. However, the protection level of ordinary air-conditioning filter elements is not high enough, so we should not take it lightly. When there are many people passing by, we still have to wear masks.