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

Undiagnosed: The Businessman

January 07, 2025

Immune Deficiency Foundation · Undiagnosed: The Businessman

Transcript: https://primaryimmune.org/sites/default/files/Undiagnosed%20Matt%20Lesser%20Transcript.pdf

The story of Matt Lesser is one that's marked, of course, by persistence, but also by vulnerability, self reflection, and hard earned humility. Join us as we explore the impossible crux of mental health, splintered family, and primary immunodeficiency.

Your support of the Immune Deficiency Foundation helps ensure people like Matt have what they need to thrive with PI. Please visit primaryimmune.org/donate.

The information, terminology, and opinions presented in this forum do not necessarily reflect the views of IDF, its Board of Trustees, sponsors, or donors.

Support for the Immune Deficiency Foundation programs for undiagnosed and underserved populations is provided by CSL Behring.

Topics

Patient stories

Diagnosis

Common variable immune deficiency (CVID)

This page contains general medical and/or legal information that cannot be applied safely to any individual case. Medical and/or legal knowledge and practice can change rapidly. Therefore, this page should not be used as a substitute for professional medical and/or legal advice. Additionally, links to other resources and websites are shared for informational purposes only and should not be considered an endorsement by the Immune Deficiency Foundation.