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 ...

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 ...