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94 and 95 masks and true Hepa filters are the best methods vs COVID. Hepa helps a lot against all respiratory viruses to slow spread in families, workplaces and
by Projectiboga 3y ago
94 and 95 masks and true Hepa filters are the best methods vs COVID. Hepa helps a lot against all respiratory viruses to slow spread in families, workplaces and communal spaces.
- reaperman 3y agoWhat are "94 masks"?
- abracadaniel 3y agoKF94 from Korea.