Preventing the development of slow-onset lung is the main thing. The best way to prevent it is to quit smoking and stay away from second-hand smoke. Early detection and examination and treatment of coughs that do not clear up after two weeks are necessary to avoid aggravating the damage to the respiratory tract. The elderly and children in particular need to build up their resistance and take special care to prevent colds in changing weather and during the change of seasons. During the influenza epidemic, it is important to go to public places less often, drink more water, open windows regularly and try to improve the living environment. For young people, their own resistance is very strong, but work pressure, irregular lifestyle, smoking, spicy and other factors also tend to reduce the body’s resistance. Therefore, regular life, light diet, less spicy and stimulating food, green decoration, and enhanced physical exercise are also good ways to improve immunity.