Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Filtration efficiency of different standard facemasks recommended by national standard regulation
| Facemask type (standard) | Filter efficiency (must be ≥X%) |
|---|---|
| N95 (NIOSH‐42CFR84) | ≥ 95% |
| FFP2 (EN 149‐2001) | ≥ 94% |
| KN95 (GB2626‐2006) | ≥ 95% |
| P2 (AS/NZ 1716:2012) | ≥ 94% |
| Korea 1st class (Korea KMEOL 2017‐64) | ≥ 94% |
| DS2 (Japan JMHLW Notification 214, 2018) | ≥ 95% |
