About the Authors

Raymond J. Roberge

dtn0@cdc.gov

Affiliation Technology Research Branch, National Personal Protective Technology Laboratory, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Pittsburgh, Pennsylvania, United States of America

Jung-Hyun Kim

Affiliation Technology Research Branch, National Personal Protective Technology Laboratory, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Pittsburgh, Pennsylvania, United States of America

Jeffrey B. Powell

Affiliation Technology Research Branch, National Personal Protective Technology Laboratory, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Pittsburgh, Pennsylvania, United States of America

Ronald E. Shaffer

Affiliation Technology Research Branch, National Personal Protective Technology Laboratory, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Pittsburgh, Pennsylvania, United States of America

Caroline M. Ylitalo

Affiliation Personal Safety Division, 3M Company, St. Paul, Minnesota, United States of America

John M. Sebastian

Affiliation Personal Safety Division, 3M Company, St. Paul, Minnesota, United States of America

Competing Interests

Caroline M. Ylitalo, PhD, and John M. Sebastian, PhD, declare that they are employees of 3M Corporation, St. Paul, MN, a manufacturer of filtering facepiece respirators. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials. Raymond J. Roberge, MD, Jung-Hyun Kim, PhD, Jeffrey B. Powell, MS, and Ronald E. Shaffer, PhD, are U.S. government employees at the National Personal Protective Technology Laboratory, Pittsburgh, PA. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: RR J-HK JBP CMY JMS RES. Performed the experiments: RR J-HK JBP. Analyzed the data: RR J-HK JBP CMY JMS RES. Contributed reagents/materials/analysis tools: RR CMY JMS JBP. Wrote the manuscript: RR J-HK JBP CMY JMS RES.