KF94 마스크는 플라스틱의 일종인 폴리프로필렌으로 만든 필터 층이 있어 작은 입자를 가두는데 효과적이다. 여분의 층은 천이나 수술용 마스크에 비해 더 높은 수준의 Covid-19 보호 기능을 제공한다.



“Any mask is better than no mask. But cloth masks and then surgical masks are not as good as N95-caliber masks,” says Ranu Dhillon, a physician at Brigham and Women’s Hospital.

"어떤 마스크라도 노마스크 보다는 낫지만 천 마스크와 수술용 마스크는 N95(KF94) 마스크만큼 좋지는 않다,"



Graham Snyder, medical director of infection prevention and hospital epidemiology at the University of Pittsburgh Medical Center , says any quality mask that offers an effective seal and is worn correctly—covering the nose and mouth—offers protection.

Dr. Synder says he would like data from the CDC on how Omicron spreads and whether the transmission is related to the types of masks. He is concerned about the number of people in the community who don’t wear masks of any type.

“Masking works. Period,” he says.

From 'THE WALL STREET JOURNAL'

https://www.wsj.com/articles/cloth-face-mask-omicron-11640984082