Roger H. Kobayashi, MD, clinical professor at UCLA School of Medicine, discusses primary immunodeficiency in geriatric patients at the Immune Deficiency Foundation’s National Summit. Primary immunodeficiency is not rare, and is not rare among geriatric patients. More patients aged over 80 years were on immunoglobulin therapy than patients aged 10 years or less. It is important to gather information on this patient population, recognize their unique problems, and address their unmet needs.