The National Institute of Allergy and Infectious Diseases (NIAID) supports research on the basic understanding of immune responses leading to the development of vaccines and novel therapeutic agents for the prevention and treatment of influenza, and improvements in public health. This research includes support of various reagent facilities, repositories, and databases that provide resources for biomedical researchers. NIAID supports the MHC Tetramer Core facility which provides synthesis and distribution of soluble MHC tetramer reagents to the global research community.