Fog affects the respiratory tract. In this foggy weather, the most "injured" is the respiratory tract. Zhi Li, deputy chief physician of the Department of Internal Medicine, Wangjing Hospital, Chinese Academy of Chinese Medical Sciences, pointed out that the number of outpatients with respiratory tract infections increased significantly due to the foggy weather and smog for several days. Harmful substances in fog can cause irritation and injury to respiratory tract, so foggy days, especially continuous foggy days, are easy to cause diseases such as upper respiratory tract infection, especially children with weak resistance and elderly people with chronic diseases are more vulnerable to smog. Experts said that this is directly related to factors such as low fog weather, poor air circulation and increased inhalable dust. Because some harmful substances on the surface, such as acid, alkali, amine, salt, benzene, dust, pollen, mites, influenza virus, pneumococcus, etc., are dissolved and adsorbed in the water droplets that form fog. These harmful substances stay and accumulate in the fog for a long time, and they are not diffused and diluted, resulting in air pollution, and the automobile exhaust in the air on both sides of the street is more difficult to diffuse. People who inhale or contact with too many harmful substances can induce asthma, allergic rhinitis, tracheitis, pharyngitis and some allergic diseases, and may also cause chronic obstructive pulmonary disease. Healthy people may even be affected, with symptoms such as cough and excessive phlegm. View original post >>