Recently, the influenza epidemic has aroused widespread concern in the society. How to carry out disinfection in schools and other crowded places to prevent influenza? Recently, the Beijing Municipal Center for Disease Control and Prevention has specially produced and issued a disinfection guide for collective units. According to CDC, influenza is an acute respiratory infectious disease caused by influenza virus, which is mainly transmitted by sneezing, coughing and other droplets, and also by direct or indirect contact with mucous membranes such as mouth, nose and eyes. Contact with articles contaminated by the virus can also cause infection. Schools and nurseries are crowded places, and the risk of concentrated fever caused by influenza virus is increased; In case of epidemic, terminal disinfection should be taken first, and daily disinfection measures should be strengthened at the same time. In the school, the key point of terminal disinfection is the air, desks and chairs, bed fences, walls, floors, door handles and other object surfaces of the class where the epidemic has occurred, and used water cups, towels and other items. When two or more classes on the same floor have an epidemic, it is necessary to disinfect the air, wall, floor, stair handrail, toilet, etc. of the corridor at the same time. Daily ventilation is mainly based on window opening; After school, the surfaces of desks and chairs, door handles, faucets, etc. in the classroom can be disinfected. With regard to the disinfection methods of common pollution objects, the municipal guidelines for disease control suggest that indoor ventilation should be dominated by opening windows to maintain indoor air circulation. Ventilate 2 to 3 times a day, each time no less than 30 minutes. When the ventilation conditions are poor, the air can be disinfected by the circulating air air disinfector. When there is no one, the air can also be disinfected by ultraviolet light. The floor and wall can be disinfected by spraying or wiping, and the effective chlorine concentration is 500mg/L. As for the method of preparing disinfectant, the guide suggests that when preparing a chlorine disinfectant with a concentration of 500 mg/L, take a chlorine disinfectant with an effective chlorine content of 5%, take one part of the disinfectant and add 99 parts of water. When spraying and disinfecting, make the surface of the article completely wet; When wiping and disinfecting, use a rag or mop to dip the above disinfectant and then wipe it. The disinfection effect time should not be less than 15 minutes. The surfaces of high-frequency contact objects such as door handles, table and chair handrails, stair handrails, faucets, and water dispenser handles are also the key areas for disinfection, and should be cleaned and disinfected regularly. Disinfection solution with effective chlorine concentration of 500mg/L can be used for disinfection, which can be soaked, sprayed or wiped for disinfection. The action time is also 15 minutes, and then wipe it with clean water. For towels and other fabrics, chlorine disinfectant with a concentration of 250mg/L can be prepared. The preparation method is to take a chlorinated disinfectant containing 5% effective chlorine, take 1 portion of the disinfectant and add 199 portions of water. Immerse towels and other fabrics in 250mg/L chlorine disinfectant. Soak for 15 minutes, then wash, or sterilize with circulating steam or boiling for 15 minutes. For food utensils such as water cups, first remove the food residue, and then boil or circulate steam to disinfect for 15 minutes. It can also be soaked with 250mg/L chlorine-containing disinfectant, and then washed with clean water after 15 minutes. (Xinhua News Agency)