This study focuses on people with Chronic Granulomatous Disease (CGD), a condition where white blood cells cannot effectively fight certain infections. Researchers are collecting blood samples to measure levels of antibodies (proteins that help fight infections) and cytokines (molecules that signal inflammation) in both adults and children with CGD. These measurements will help understand how common these markers are in people with CGD.

To be part of this study, you must have a confirmed diagnosis of CGD. This can be done through specific tests like flow cytometry, which looks at how well your cells react, or through genetic testing for mutations linked to CGD. You or your guardian must agree to participate and follow study instructions.

• This is an observational study, meaning there is no treatment given.
• The study requires blood samples to be collected.
• Participation is only for those who haven't had a bone marrow transplant or gene therapy.