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For many families living with primary immunodeficiency (PI), answers don’t come easily. Symptoms can appear slowly, change over time, or affect multiple systems in the body—making diagnosis a long and frustrating journey. Vivianne’s story is one example of how persistence, connection, and the right care can make all the difference. Vivianne lives with CTLA-4 Deficiency, a rare primary immunodeficiency that affects the immune system’s ability to regulate itself. Rather than si

When Simon was born, there was no immediate sign that anything was wrong. But at just 11 days old, he was hospitalized with a high fever...

Peoria, IL — The Yellow Bear Foundation is proud to announce the official opening of the Yellow Bear Foundation Office of Immunology &...

We are opening a brand-new medical office in Peoria through a powerful partnership with Midwest Allergy Sinus Asthma SC!

Some heroes wear capes. Others wear hospital bracelets and a brave smile. When Ava was born, her parents had no idea they’d be navigating...

If you ever meet Laura Zamora, you’ll notice something right away—her joy. It’s not performative. It’s not forced. It’s the kind of joy...

When Tessa Decker stepped onto the stage at the Arnold Sports Festival, she didn’t expect to win. It was her first time competing in pole...