High temperature is also foggy, functional masks do not letter

Mist is a mixture of fog and haze. Haze can cause certain harm to human health, especially to the respiratory system and cardiovascular system. For patients with chronic respiratory diseases such as bronchial asthma, chronic bronchitis, obstructive emphysema and chronic obstructive pulmonary disease Haze and haze can cause acute or acute exacerbations. If it is in this environment for a long time, it will induce lung cancer. Haze and haze has a severe effect on human cardiovascular and cerebrovascular diseases, which will hinder normal blood circulation, leading to cardiovascular disease, hypertension, coronary heart disease, cerebral hemorrhage, and may induce angina pectoris, myocardial infarction, and heart failure.

As winter fog is known as the “winter killer,” people often think that haze days occur in the cold winter and early spring. In fact, smog may also occur in high temperature days. For example, on the day of the summer, Beijing’s highest temperature was 30°C, and the Beijing Meteorological Observatory has issued a yellow-early warning signal. In fact, in addition to climatic factors, industrial waste gas, automobile exhaust, dust in the air, bacteria and viruses in the air are also the “culprits” causing haze.

So, how to resist the harm of haze on human health? Many people think of masks. Do not you see, even in the high temperature days above 30 °C, some people wear masks. However, medical experts believe that wearing a mask can prevent some of the dust from entering the nasal cavity and provide some protection. But for PM2.5, even professional medical masks have limited resilience. Because professional masks are mainly targeted at PM3 or more inhalable particulate matter, the ability to withstand inhalation of particulate matter below PM2.5 is not strong.

PM2.5 refers to particles in the atmosphere that are less than or equal to 2.5 microns in diameter, and are also referred to as lung-infiltrating particles. Its diameter is less than 1/20 of the thickness of human hair. Although PM2.5 is only a component of the Earth's atmospheric composition, it has an important effect on air quality and visibility. Compared with coarser airborne particles, PM2.5 has a small particle size, is rich in toxic and hazardous substances, has a long residence time in the atmosphere, and has a long transportation distance, and thus has a greater impact on human health and atmospheric environmental quality.

Experts pointed out that if the mask can block the PM2.5, it must be very detailed and it will be difficult for people to breathe. Most of the masks used by the public can't ensure complete contact with the face. There is a slight gap, PM2.5 will be able to enter, so most masks on the market can not achieve the effect of blocking PM2.5. As for activated carbon adsorption, it is nonsense, because the main effect of activated carbon is odor, and the filtration capacity for suspended particles is almost zero.

However, many businesses today have introduced various types of masks with anti-fog, anti-PM2.5, anti-dust and other features. Products include imports, joint ventures, and domestic production. There are countless varieties, ranging in price from a few yuan to a few hundred yuan.

So, does the functional masks that are popular on the market have such functions as anti-fog and haze? The China Consumers Association conducted a comparative test of protective performance against 37 masks sold on the market. The results showed that there were only 9 models with good mothproof effect and comfortable wearing, and the total number was less than 30%. At the same time, under the same detection standard, the anti-mite effect of masks over 100 yuan is not necessarily better than the product within 10 yuan.

Not long ago, Zhejiang Consumer Protection Committee conducted comparative tests on various types of masks sold by major commercial websites such as Tmall, JD, Amazon, and No. 1 stores. 29 batches of masks were sampled and 25 batches were tested (4 batches could not be included in the scope of the test due to lack of any product information). Even though no batch of masks reached the national standard, the minimum filtration efficiency was only 5% and the highest was only 82.2. %.

In view of this, industry experts have pointed out: Do not blindly believe in so-called functional masks, and do not believe in the masks purchased by online shops, because some functional masks bought from online shops are as inconsistent as similar products in the small commodity market.

Most consumers said that in the face of such complicated market, how to choose suitable masks is indeed difficult, and most of the time they have to follow the recommendation of the business. However, the Consumers Association for consumers such "tricks": more types of masks, professional dust masks, medical masks, warm masks, etc., different masks are divided into various types. Therefore, consumers should buy different masks to wear in the formal channels according to the specific circumstances when choosing a mask. At present, the mask with good anti-fog and haze effect is a disposable cup mask and a disposable folding mask made of a non-woven material with a filtering effect. Note that these two types of masks are not washable and cannot be reused. When feeling odor in the mask or a feeling of boring breathing, they should be discarded and replaced with new ones. At the same time, when choosing masks, do not just focus on the types of masks. Instead, be sure to wear them properly. Be sure to choose a face mask that fits your face, and choose a face mask that matches your nose or face. Otherwise, leave a gap and inhale. Still dirty air, no protection.

For the respiratory system, cardiovascular disease patients, and the elderly and children, to avoid the harm caused by haze, do not use the mask as a "magic weapon." The best way is to reduce going out and close doors and windows at home. When you return home, you should wash your face and bare skin immediately. If you have a conditional home, you can install an air purifier, but be careful when changing the filter core.

Many elderly people have the habit of exercising in the morning. It is best not to exercise outdoors. Exercise will accelerate blood circulation, and the body will more easily absorb the germs in the fog. Generally 6 to 11 o'clock in the morning is a time when the pollution is more serious. The air in the evening is relatively clean. Maybe change to exercise in the evening.

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