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Cover your mouth and nose with a disposable mask and fasten it securely to minimize the space between your face and the mask; Avoid touching disposable masks when using them. After touching a used mask, for example, to remove it, wash your hands with soapy water or hand sanitizer. After the use of a disposable mask, the outer layer of the mask tends to accumulate a lot of dirt, bacteria and other dirt in the outside air, while the inner layer blocks the exhaled bacteria and saliva, so be careful not to mix the two sides. Do not reuse disposable masks. They should be replaced every six to eight hours. Disposable masks should be discarded after each use and disposed of immediately after removal. When the mask is not worn, fold it up and put it in a clean zipper bag. Fold the side of the mask close to your mouth and nose. Do not slip it into your pocket or hang it around your neck. Disposable masks are moistened by exhaled heat or saliva, and the barrier protection effect is reduced. Xiaobian suggests that several more masks should be prepared at ordinary times and timely replacement is more hygienic. In addition, automakers are preparing to deal with the spread in the United States by making work-at-home tools ailable to employees, increasing the ailability and ailability of hygiene products, and imposing trel bans or restrictions to keep production going. Gm, ford and other companies he also implemented new visitor agreements or restrictions to try to prevent employee infections. Anti-droplet KF94 mask OEM workers in sichuan also provided operation and management services for distributed home stay facilities. As some of the managed home stay facilities could not get licenses, the number of them dropped from many to many. In 1874, there was also the appearance of such products as "sage home stay street". And when the epidemic enters the subside phase, the relaxed nurses are more likely to experience potential psychological trauma and suffer from post-traumatic stress disorder. Therefore, it is necessary