The medical standard protective masks have a life span, and the masks are dedicated for special use and cannot be used interchangeably.

As the new crown pneumonia epidemic continues to spread, masks have become a mandatory public health necessity in many parts of the world. Due to the dwindling supply of medical surgical masks and N95 masks (they are being properly transferred to medical care facilities), the general public is often......

Students in elementary and middle schools in most parts of Canada have started to go to school. This is the first time students have stepped onto campus since the pneumonia epidemic has raged in half a year. However, the students and teachers came back wearing masks. What kind of mask to wear, how t......

At the moment when urban life is gradually recovering, everyone still needs to pay attention to wearing masks. While performing key group management, employee health monitoring, information registration, publicity and education, etc., how to do daily office work, outgoing duties, and street purchase......

A sudden epidemic has made masks a necessity, and the quality of masks has also become a hot spot of public concern. What testing does a qualified mask need?

First of all, the words "medical surgical mask" must be written on the outside of the package.