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Updated April 23, 2021

New! Elastomeric Half Mask Respirator Resources
New! Respirator Exhalation Valve Research

Read the new technical report, Filtering Facepiece Respirators with an Exhalation Valve: Measurements of Filtration Efficiency to Evaluate Their Potential for Source Control.

NPPTL Respirator Assessments to Support the COVID-19 Response

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Page last reviewed: April 23, 2021