Rumor identification: fireworks can not prevent disease. Rumor Analysis: 1, fireworks or firecrackers are mainly composed of saltpeter, sulfur, charcoal and metal, there is no research to show that its chemical composition, as well as the products of combustion, can inhibit the spread of respiratory diseases. 2, if too close to the fireworks, smoke inhalation is also at risk of burns, which can irritate the eyes, throat and lungs. 3, the smoke generated by the fireworks can make the atmosphere in a short period of time, the rapid rise in respirable particles pm2.5 content, which is not good for health. Fireworks will produce sulfur dioxide, nitrous oxide, nitrogen dioxide and other gases, these toxic and harmful gases are invisible “killers”, the respiratory system, the nervous system has certain damaging effects, can stimulate the respiratory tract, and in serious cases can cause respiratory diseases. Special tips: During the epidemic of respiratory infections, wearing a mask has a very good effect. Medical surgical masks and N95 masks can both prevent respiratory infections to some extent. Compared to medical surgical masks, N95 masks provide a better seal. However, when choosing N95 masks for confirmed patients, care should be taken to choose N95 masks without breathing valves so that the virus does not spread into the air through the exhalation valve.