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3 Apr 2020 There are some other standardised face masks by NIOSH that are N99 The medium level mask FFP2 provides additional protection from
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3 Feb 2020 Masks are loose fitting covering the nose and mouth Designed for one way The US Center for Disease Control CDC cites the N95 respirator For example if a mask is FFP2 rated it will filter at least 94 of We are seeing this in action already in countries such as China South Korea and Italy.
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The relative performance of the NIOSHapproved and ENcertified initial penetration levels of N95 P 00 FFP2 and FFP3 respirators were measured using a
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