CDC says N95 masks offer the best protection against omicron variant but stops short of saying everyone should wear them

N95 masks, which are approved by NIOSH, are designed to filter up to 95 percent of particles, according to the CDC. KN95s are supposed to meet a comparable Chinese standard, but there is no Chinese regulatory agency ensuring that, according to Anne Miller, executive director of Project N95, a nonprofit organization that distributes free N95s and children’s masks in the United States. However, U.S. firms make high-quality KN95s, she said.

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