What You Should Know About Using Facemasks and Respirators During a Flu Pandemic (Centers for Disease Control and Prevention)
This fact sheet provides information about the use of facemasks and respirators in public places during an influenza pandemic.

Interim Public Health Guidance for the Use of Facemasks and Respirators in Non-Occupational Community Settings During and Influenza Pandemic (U.S. Department of Health and Human Services)
This document describes interim guidance for the use of facemasks and respirators in certain public settings during an influenza pandemic

FDA Clears First Respirators for Use in Public Health Medical Emergencies (U.S. Food and Drug Administration)