On September 14, 2020, the National Institute for Occupational Safety and Health (NIOSH), within the Centers for Disease Control and Prevention (CDC), published a request for information to obtain public input on the deployment and use of elastomeric half mask respirators in healthcare settings and emergency medical services (EMS) organizations during the COVID-19 crisis. Comments were to be received by October 14, 2020. NIOSH is extending the comment period to close on December 14, 2020, to allow stakeholders and other interested parties additional time to respond.