The European Society for immunodeficiency (ESID) is a non for profit association that was created in 1994. ESID has been striving to improve the knowledge in the field of Primary Immunodeficiency (PID) by encouraging research, developing educational programs and fostering cooperation among all those involved in the diagnosis, treatment and management of these diseases.

ESID is organized in 7 working parties – Inborn Errors, Clinical, Education, Genetics, Registry, ESID Juniors, PID Care in Development.