I. Principles of disinfection Suspected or confirmed cases of pneumonia with novel coronavirus infection should be promptly disinfected at any time and at the end of the premises where they live and work to prevent the spread of the epidemic. Scope and focus of disinfection 1. The specific scope and target of disinfection should be determined by a public health physician based on epidemiological investigation and the environment in which the contamination may exist. 2. Air in places where the patient lived and worked at the time of illness. 3.The patient’s respiratory secretions and the environment they may contaminate. 4. The places where the patient lived and worked at the time of the disease, the objects that the patient came into contact with and other objects that may be contaminated. Selection of disinfection methods Select appropriate disinfection methods for different disinfection objects and disinfection sites. For chemical disinfection of epidemic source sites, chlorine-containing and peroxide-containing high-efficiency disinfectants should be used, and disinfection should be carried out according to the concentration and duration of action to ensure the disinfection effect. Disinfection methods for common contaminated objects 1. Indoor air: After the house is sealed, use a 15% peroxyacetic acid solution at a dosage of 7 ml/m^3 (1 g/m^3), place porcelain or glassware to heat and evaporate, fumigate for 2 hours, and then open doors and windows for ventilation. Or disinfect with 2% peroxyacetic acid solution (8 ml/m^3) aerosol spray, acting for 60 minutes. 2. Ground, walls, doors and windows: disinfection by spraying with chlorine disinfectant or 0.2%-0.5% peroxyacetic acid solution with an effective chlorine content of 1000mg/L-2000mg/L. The amount of solution absorbed is 150 ml/m^2-300 ml/m^2 for clay walls, 100 ml/m^2 for cement walls, wood panel walls, lime walls, and 200 ml/m^2-300 ml/m^2 for ground spraying. above disinfection treatment, the action time should be not less than 60 minutes. 3. Clothes, bedding and other textiles: can be disinfected by boiling for 30 minutes, or by soaking in an effective chlorine disinfectant of 250mg/L-500mg/L for 20 minutes. 4, patient excrement and vomit: patient excrement and vomit are best held in fixed containers. For dilute excrement and vomit, add 50g of bleach or 2000mL of disinfectant solution containing 20,000mg/L effective chlorine per 1000mL and stir well for 2 hours. Formed feces cannot be disinfected with dry bleach, but can be disinfected with 20% bleach emulsion (containing 5% effective chlorine) or effective chlorine 50,000mg/L chlorine-containing disinfectant solution, 2 parts added to 1 part of feces, mixed well and left for 2 hours. 5.Dining (drinking) utensils: Prefer boiling disinfection for 15 minutes, or use effective chlorine 250mg/L-500mg/L chlorine-containing disinfectant solution for 15 minutes, then wash with water. 6, household goods, furniture surfaces: use 0.2% peroxyacetic acid solution or effective chlorine 500mg/L-1000mg/L chlorine disinfectant for soaking, spraying or scrubbing disinfection, wipe clean with water after 15 minutes of action. 7, corpse: tightly wrapped with a cloth sheet soaked with 0.5% peroxyacetic acid solution, mouth, nose, ears, anus, vagina to be clogged with cotton balls soaked with 0.5% peroxyacetic acid and then cremated as soon as possible. 8. Hands: Disinfect hands with alcohol-containing quick-drying hand disinfectant. Also use 0.5% iodophor solution (containing effective iodine 5000 mg/L) for 1 minute – 3 minutes. 9.Transportation tools: Use chlorine disinfectant solution containing 500mg/L-1000mg/L effective chlorine to wipe or spray until the surface is wet, and act for 15 minutes. 10.Waste: All waste generated by patients should be treated as medical waste in principle. 11.Sample delivery box: The samples should be packed and delivered in strict accordance with the relevant biosafety requirements. When needed, the surface of the delivery box can be wiped or sprayed with chlorine disinfectant solution with effective chlorine of 500mg/L-1000mg/L until the surface is moistened and disinfected for 15 minutes. III. Disinfection Personal Protection Requirements When disinfecting the environment contaminated by suspected or clinically diagnosed cases, wear protective clothing, medical protective masks of N95 or higher, protective glasses (should be anti-fog), disposable latex or nitrile gloves, rubber boots or disposable waterproof shoe covers, and single-use work caps. Wash and disinfect hands immediately after each contact with contaminants. Hand disinfection with 0.3-0.5% iodophor disinfectant or rapid hand disinfectant rubbing for 1-3 minutes. Precautions 1. For different disinfection objects, disinfection should be carried out in accordance with the above-mentioned use concentration, action time and disinfection method to ensure disinfection effect. 2.Disinfectants have certain toxicity and irritation, so attention should be paid to personal protection when preparing and using them. Meanwhile, disinfectants have certain corrosiveness, so attention should be paid to wiping with water after disinfection to prevent damage to disinfected items. 3.The disinfectant used should be a qualified product that has been filed and should be within the expiration date. 4.When necessary, disinfection effect evaluation can be carried out according to the methods specified in the Disinfection Technical Specification. 5.Fill out disinfection work records according to the requirements of the Disinfection Technical Specification. Content source: China CDC