And many companies now make N95 respirators. But for 3M, which has gone from producing billions to hundreds of millions of N95s in recent years, the respirator has become “a more prominent ...

A PLOS ONE study tested the real-world filtration efficiency of cloth masks, medical masks, and respirators, revealing large ...

FILE - In this March 5, 2020, file photo, Dr. Deborah Birx, Ambassador and White House coronavirus response coordinator, holds a 3M N95 mask as she and Vice President Mike Pence visit 3M headquarters ...

If N95 masks are not available, the CDC recommends using a well-fitting mask made of at least two layers of breathable fabric. 3M is the largest manufacturer of N95 masks in the United States.