National Institute of Allergy and Infectious Diseases Tags: Government Agency.The National Institute of Allergy and Infectious Diseases (NIAID) is one of the 27 institutes and centers that make up the National Institutes of Health (NIH) an agency of the United States Department of Health and Human Services (HHS). thumbnail formation year 1955-01-01T00:00:00+02:00 headquarter Bethesda Maryland leader Anthony Fauci location Bethesda Maryland parent organisation National Institutes of Health Learn more... Loading...