How to wear a mask on a smoggy day

How to wear a mask on a smoggy day

Tongling Disease Control

What is haze

Haze: An aerosol system composed of extremely fine particles such as dust, sulfuric acid, nitric acid, etc. that causes visual obstruction.

Fog: An aerosol system consisting of a large number of tiny water droplets or ice crystals suspended in the air near the ground.

PM2.5 refers to fine particles suspended in the air with an aerodynamic equivalent diameter of ≤2.5 μm. It can enter the alveoli and has the greatest impact on the human body. PM2.5 is also called respirable particles.

Use of anti-smog masks

Standard series of anti-haze masks

"The standards for anti-haze masks are mostly

"-N series (American standard)

"–KN series (Chinese standard)

""• For example, N90, N95, N99

Recommended masks

"※KN95 or N95 standard

"※Head-mounted

"※With exhalation valve

"※With nose pads

"※Cannot be folded

People who should not wear anti-haze masks

The better the mask is at filtering suspended particles, the more difficult it will be to breathe, making it more likely to experience hypoxia, chest tightness, etc.

People with respiratory diseases such as asthma, pregnant women, infants and young children, and frail elderly people should try their best to avoid wearing anti-smog masks that pose a greater barrier to breathing.

If you wear it, take it off immediately if you feel dizzy, nauseous or any other discomfort during use. Individuals can reduce or avoid outdoor activities and sports according to the corresponding haze level, and pay attention to traffic safety. Elderly and children with weak immunity and susceptible people with respiratory diseases should go out as little as possible. It is recommended to wash your face, rinse your mouth, wash your mouth and nose in time after going out and take off your outer clothes to reduce pollution.