Understanding primary immunodeficiency (PI)
Understanding PI
The more you understand about primary immunodeficiency (PI), the better you can live with the disease or support others in your life with PI. Learn more about PI, including the various diagnoses and treatment options.
Learn more about PI
Living with PI
Living with PI
Living with primary immunodeficiency (PI) can be challenging, but you’re not alone—many people with PI lead full and active lives. With the right support and resources, you can, too.
Learn more about living with PI
Get involved
Get involved
Be a hero for those with PI. Change lives by promoting primary immunodeficiency (PI) awareness and taking action in your community through advocacy, donating, volunteering, or fundraising.
Get involved today
Advancing research and clinical care
Advancing research and clinical care
Whether you’re a clinician, researcher, or an individual with primary immunodeficiency (PI), IDF has resources to help you advance the field. Get details on surveys, grants, and clinical trials.
View resource details

Donor spotlight: Steve Welker

July 31, 2020

Steve Welker - Donor Spotlight.jpg — Steve Welker, a member of IDF's Sustainer's Club.

Steve Welker discovered the Immune Deficiency Foundation (IDF) after a family member of his was diagnosed with primary immunodeficiency (PI). After the diagnosis, Welker was determined to provide hope and support for the PI community, which led him to join the IDF Sustainer's Club and donate monthly. He stated, “I am blessed to be in a position to support IDF and feel that it is an extremely worthwhile organization.”

Thank you, Steve!