The International Society for Respiratory Protection

NIOSH NPPTL Respiratory Protection Activities

NIOSH NPPTL published two new web pages related to our respiratory protection activities. Please view the web pages below for additional information.

This web page provides summaries of NIOSH elastomeric half mask respirator (EHMR) research studies as well as links to NIOSH resources and other relevant published material about EHMRs. 


This web page provides an overview of NIOSH’s research studies that focus on determining the potential for respirators with exhalation valves to contribute to source control—i.e., their ability to filter respiratory secretions to prevent disease transmission to others.