1. Enforcement policy for face masks and barrier face coverings during the coronavirus disease (COVID-19) public health emergency: guidance for industry and Food and Drug Administration staff Publication: [Silver Spring, MD] : Center for Devices and Radiological Health, March 13, 2023 Subject(s): COVID-19 -- prevention & controlGovernment RegulationMasks -- standardsMedical Device LegislationPersonal Protective EquipmentUnited StatesUnited States. Food and Drug Administration