The CoSImmGEn study, sponsored by Institut Pasteur, aims to establish a comprehensive cohort of healthy and sick subjects to investigate the immune system's genetic and environmental influences. This initiative addresses a significant gap in population cohorts, providing valuable biological resources for both public and private research entities globally. The potential applications of the findings could extend to various therapeutic areas, including autoimmune diseases, infectious diseases, and cancer, positioning the study as a critical asset for future collaborations and partnerships in the biopharmaceutical industry. The open-access nature of the biological resources may enhance the study's attractiveness to external researchers and companies, fostering innovation and development in immunology.