The Sixth European Congress of Immunology (6th ECI 2021) that will be held virtually from September 1-4,2021 and will cover all fields of basic and applied immunology, ranging from innate to adaptive to omics aided big data mining of forward genetics and vaccination as well as mechanistic regulation of memory generation and tissue specific instruction of T- and B- cell differentiation through the 4-track program. Four tracks will be dedicated to “Cellular Immunology”, “Molecular Immunology“, “Diseases and Immune Response” and “Innovative Technologies and Immunotherapies”.