FDA blocks most KN95 masks from approved list — Kevin Dental
May 07, 2020·The Federal Drug Administration (FDA) today banned most prior approved KN95 masks. The Emergency Use Authorization, which was initially placed on April 3rd, 2020, due to respirator shortages in the United States, was supposed to clear the way for respirators not approved by the National Institute of Occupational Safety and Health (NIOSH) to be used by healthcare personnel in …