Who should wear one: Anyone who wants to maximize protection from the ultra-contagious omicron variant.
KN95 masks
Percentage of aerosol particulates filtered: 95% (but see below)
NIOSH-approved: No
Who should wear one: Anyone who wants to maximize protection from the ultra-contagious omicron variant.
N95 masks
Percentage of aerosol particulates filtered: 95%
NIOSH-approved: Yes
Who should wear one: Anyone who wants to maximize protection from the ultra-contagious omicron variant. N95s labeled "surgical" should be reserved for health care workers