First, smoking and respiratory diseases 1, smoking and COPD and chronic bronchitis The incidence of COPD caused by smoking in China is as high as 40.7%, smokers have significantly reduced lung function, smoking cessation can slow down the decline in FEV1 after bronchodilators. 2, smoking and respiratory infections Smoking can reduce immune function, can cause imitation Buddha respiratory tract infections, pregnant women smoking can increase the risk of recurrent respiratory infections in children, passive smoking can aggravate childhood asthma, asthma children, such as mothers smoking will be more serious than non-smoking mothers of children with asthma attacks, pre-pregnancy smoking history can increase the probability of asthma attacks in children. A history of pre-pregnancy smoking can increase the probability of asthma attacks in children. 3. Smoking and asthma More than 60 studies have shown that the risk of asthma attacks is significantly increased if parents smoke during pregnancy. The effects of paternal smoking are significant, and the effects of maternal smoking are even more severe. The impact on the birth is also very obvious. Smokers have significantly more asthma attacks and significantly higher severity scores. Hospitalization and mortality rates for asthma are significantly higher. 4. Smoking and lung cancer There are more than 4,000 chemicals in tobacco smoke, and at least 69 components are known carcinogens. Lung cancer has been linked to secondhand smoke exposure in a dozen studies worldwide, the earliest of which was conducted in 1981, which found that nonsmoking women married to smoking husbands were at higher risk of lung cancer. Second, smoking and cardiovascular disease The top three diseases that cause death by smoking cessation: foreign data – COPD, coronary heart disease, lung cancer. Domestic data – COPD, lung cancer, coronary heart disease. Smoking promotes atherosclerotic plaque formation and progression, and smoking can increase the risk of coronary heart disease, increased risk of myocardial infarction, increased risk of cardiogenic city death, and closely related to cerebrovascular risk. Within 20 minutes from the last cigarette: BP drops, temperature, and heart rate return to normal, the risk of myocardial infarction decreases within 24 hours, the elevated risk of coronary heart disease can be reduced to half within 1 year, the risk of stroke can be reduced to the same level as non-smokers within 5 years, and the risk of coronary heart disease decreases to the same level as non-smokers within 15 years. Smoking cessation is the most cost-effective intervention, with an average cost per life saved: $2,000-6,000 for smoking cessation, $9,000-26,000 for antihypertensive drugs, and $50,000-196,000 for lipid-lowering drugs, with one in three smokers worldwide coming from China. One million people die each year from smoking-related diseases, 2.5 times higher than in the United States, and more than the number of deaths from AIDS, tuberculosis, traffic accidents, and suicide combined. If smoking rates are not effectively reduced, the number of deaths from smoking will double by 2025.