I went running in foggy days and now I often cough. Is it related to running in foggy weather?

20 14 Deputies to the National People's Congress, Zhong Nanshan, a deputy to the National People's Congress and an academician of China Academy of Engineering, was once again questioned by the media about the harm and governance of smog. Regarding the impact of smog on human health, Zhong Nanshan said that from the domestic research, there are not many credible statements, mainly causing cardiovascular and respiratory diseases. A study published in the Proceedings of the National Academy of Sciences last summer on the concentration of dustfall in the north and south of Huaihe River showed that the life expectancy in the north of Huaihe River was shortened by 5% due to the difference between heating and coal burning.

.52 years. Therefore, the smog concentration increases by 100 micrograms per cubic meter, and the life span is shortened by three years. "This is the most powerful proof we have seen so far."

Zhong Nanshan found that after the concentration of PM 2.5 increased, the harm began to be greater. When it reaches a frequency band, the harm to health increases obviously, exceeding 500 micrograms per cubic meter. So in the afternoon

2.5 The harm to health does not increase gradually, but there is a frequency band after the initial increase, and then it increases obviously. What worries Zhong Nanshan is that in the next five to seven years, the impact of smog on human body, asthma, chronic obstructive pulmonary disease, especially lung cancer, will be obvious.

High-concentration smog has a great influence on human body.

Zhong Nanshan introduced that the research on the influence of smog in Shenyang on children's cough and asthma in June of last year (5438+065438+ 10) showed that the average cough incidence rate of children in foggy days increased from 3% to 7%, and the asthma incidence rate doubled. The concentration of dustfall decreased from relatively low to 100, and the incidence increased linearly from 200 to 200.

500 becomes a frequency band, and the incidence does not always increase. After 500 to 800, it became a sharp increase.

Zhong Nanshan said that if the PM in Beijing is around 500,

2.5 The concentration of 30 years will definitely have a great impact on human health, but there is no way to predict the specific impact, such as how many people will get lung cancer, and there is no way to predict it now.

Last year, when Zhong Nanshan talked about the harm of smog, he was questioned by Fang, and Zhong Nanshan also responded positively to the question at the meeting. Some things can't be said to be harmful until they are seen, but they can be predicted. "Now data from all over the world confirm that the situation is more serious than I expected. Now, the World Health Organization puts smog and smoking at the same level, which is an important factor affecting the body, especially for lung cancer and bladder cancer. "

What is smog?

The fog condensed by water vapor is beautiful and romantic; Haze means that the air contains a lot of extremely fine dry dust particles, such as dust mites, sulfuric acid, nitric acid, organic hydrocarbons and so on. Floating evenly in the air makes the air turbid, blurs vision and deteriorates visibility, which has a serious impact on our health, especially on the human respiratory system in direct contact.

What is PM2.5? Unscramble the harm of PM2.5-induced asthma in allergic cough

Particles with a diameter of more than 10 micron will be blocked out of people's noses; Particles with a diameter of 2.5 microns to 10 microns can enter the upper respiratory tract, but some of them can be excreted through sputum and blocked by villi inside the nasal cavity, which is relatively harmless to human health; The fine particles with a particle size less than 2.5 microns, that is, PM2.5 particles, are less than one tenth of the diameter of human hair and are not easy to block. After being inhaled into human body, it will directly enter the bronchus, which can act on autonomic nerve to cause bronchospasm, thus increasing respiratory resistance, even damaging epithelial cells and cilia of bronchial mucosa, increasing secretion of bronchial mucosa, reducing the purification function of lungs and increasing pathogenic bacteria in lungs and bronchus. The occurrence of chronic bronchitis interferes with the gas exchange in the lungs, such as fine dust, smoke dust, dust mites, pollen and other suspended substances. Children with weak respiratory immunity or the elderly, allergic or asthmatic patients inhale these allergens, which will stimulate the respiratory tract, cause repeated cough, chest tightness, poor breathing and other symptoms, and easily induce bronchial asthma and airway inflammation in a short time.

On the other hand, when the temperature is low in foggy days, children's respiratory tract will be exposed to cold and dirty air, which will reduce the defense function of bronchi. Repeated stimulation will make the bronchus in a state of hypersecretion, and respiratory tract infections will occur repeatedly, thus inducing an increase in the incidence of allergic asthma.

The most intuitive impact of air quality PM2.5 is respiratory allergic diseases. A large number of sensitizing substances in smog are easily inhaled and sensitized by respiratory tract, leading to a series of inflammatory reactions. Therefore, the smog weather directly increases the incidence of respiratory tract infection, allergic cough and allergic asthma in children.

Anti-allergic probiotics prevent cough and asthma in children.

The movement pattern of animal tracheal inflammation is often used to study and evaluate the effect of antiallergic probiotics on the tracheal response of asthma caused by allergens. The experimental results confirmed that before and during sensitization, after oral administration of compound anti-allergic probiotic Kangminyuan probiotic strain stimulated trachea, various manifestations of asthma were inhibited, including the production of allergic antibody IgE, tracheal inflammation and respiratory tract overreaction. The decrease of cell number and respiratory tract overreaction in lung lavage fluid are related to the decrease of inflammatory cytokines concentration in lung lavage fluid. Under the influence of these interests, we therefore come to the conclusion that Kang Minyuan's antiallergic probiotics are a good prospective therapy for antiallergic and non-drug treatment. We found that children with respiratory allergic diseases took Kangminyuan anti-allergic probiotics for 8 weeks, which significantly improved the lung function of school-age children. Most importantly, doctors all over the world have assessed that supplementing allergic probiotics to children with allergic asthma in allergic cough has no major or minor side effects, and has improved the immune regulation of children with bronchitis with recurrent allergic asthma.

It should be noted here that not all probiotics can be allergic. Screening of anti-allergic probiotic strains is to screen probiotic strains with anti-allergic ability by measuring the influence of Th 1 immunity on interleukin (IL- 12) secretion after co-culture of human dendritic cells and anti-allergic probiotics. In order to improve the comprehensiveness of immune regulation of allergic patients and solve the different effects of diseases and constitutions, Kangminyuan probiotics used compound antiallergic probiotic strains screened from nearly 200 blood samples, and the effect was more remarkable than that of single strain.