An Emergency Use Authorization in the United States is an authorization granted to the Food and Drug Administration under sections of the Federal Food, Drug, and Cosmetic Act as added to and amended by various Acts of Congress, including by the Pandemic and All-Hazards Preparedness Reauthorization Act of 2013, as codified by 21 U.S.C. § 360bbb-3, to allow the use of a drug prior to approval. Wikipedia