Rumor identification: Disinfection will destroy the protective effect of the mask. Rumor Analysis: 7 days is too long to use a mask, and disinfection will destroy the protective effect of the mask. The CDC points out that N95 masks can be “extended use period” and “limited reuse” under strict specifications under special circumstances such as insufficient supply. 1, extended use period: refers to the user does not take down a wear, can be appropriately extended use time; 2, limited reuse: if the manufacturer stated the number of times can be reused, to the manufacturer’s regulations shall prevail. If no instructions, then generally no more than 5 times. Ordinary people generally take off and wear every day far more than the number of days and times, and the use of alcohol or other disinfectants disinfection may destroy the protective effect of the mask. In addition, health care workers and those in contact with infected patients must strictly adhere to the principles of mask use and must not reuse disposable masks. The general public does not contact with patients, in the case of masks without sticky secretions can increase their frequency of use as appropriate. Special Note: Under normal circumstances, an N95 mask cannot be worn for more than 4 hours, but it can be used repeatedly when the supply of N95 masks is insufficient. Since the filtration efficiency of N95 masks will gradually decrease with the use of time, in order to make better use of the mask, it is necessary to wash hands according to the protocol, avoid touching the inside of the mask when wearing it, and replace it immediately when the mask is contaminated or appears wet and broken.