What protective measures should citizens take in a smoggy weather environment?

First, enhance your resistance and immunity. At present, there is no effective medicine to remove tiny particles in the respiratory system. To reduce the adverse effects of smog on the human body, we must first minimize contact and enhance our own resistance and immunity. This requires everyone to exercise more and keep healthy, especially the elderly with decreased immunity and children with immature immunity. When the temperature drops, they should keep warm to prevent colds. In addition, in winter and cold weather, the elderly and children can take orally or inject vaccines to increase immunity. "

Second, in terms of preventive measures, indoor ventilation must be maintained. Many people think that since there is smog outside, we should close the window and stay at home. In fact, the impact of smog on the human body is related to the density in the unit space. In the case of good ventilation, the impact is relatively small, and poor air circulation is not conducive to reducing the density of smog. Of course, if the smog outside is very serious, it is best not to open the window. Moreover, we should reduce the time of outdoor activities, especially try not to go to closed public places with high population density.

Third, if the outdoor smog is serious, such as PM2.5 exceeding the standard, wearing a mask when going out has a certain protective effect. However, disposable paper masks and activated carbon masks sold in the market are of little use. To prevent PM2.5, it is necessary to use hospital isolation wards and anti-virus N95 masks to be effective. However, it is not recommended to wear a mask for a long time, because wearing a mask for a long time has an impact on respiratory function and gas exchange, and it is also easy to make people feel chest tightness and discomfort, unless the haze weather is very serious or people who work outdoors for a long time. "

Fourthly, for all kinds of air purifiers sold in the market, theoretically, air purifiers have certain disinfection and sterilization functions, but their functions are limited. So don't rely too much on the air purifier, thinking that as long as the purifier is on, it can be ventilated.

Hazy weather is generally divided into six levels. It is not suitable for outdoor activities when the haze weather reaches level 4 or above.