No test included in the study “fully satisfied the minimum performance requirements” set by the World Health Organization or U.S. Food and Drug Administration, the researchers said.
No test included in the study “fully satisfied the minimum performance requirements” set by the World Health Organization or U.S. Food and Drug Administration, the researchers said.
N95 masks offer stronger protection against the omicron coronavirus variant and health officials warn single-layer cloth masks may not provide enough protection against the highly transmissible variant.
N95 masks offer stronger protection against the omicron coronavirus variant and health officials warn single-layer cloth masks may not provide enough protection against the highly transmissible variant.