Immunology Core Summary The overall objective of the Immunoassay core is to provide high quality materials that will make feasible the studies proposed in projects 1 and 2, and especially to assure that studies are using reagents and pretested materials that will produce reliable and reproducible results. The core will provide purified recombinant viral proteins for use in both projects and provide binding and functional immunoassays for in depth analysis of antibody responses to SARS CoV-2 in different population groups over a period of follow-up. The core is made up of two labs, one at Tulane and one at WSU, which will function in close collaboration to achieve our aims