The more you understand about primary immunodeficiency (PI), the better you can manage it. Learn about PI diagnoses and treatment options.
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.
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.
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.
Broadly, the Immune Deficiency Foundation (IDF) follows vaccine recommendations issued by the American Academy of Pediatrics (AAP) for children under 18 years of age and the American Academy of Family Physicians (AAFP) for adults aged 18 and older.
However, in March 2026, the Infectious Diseases Society of America (IDSA) published recommendations on the prevention of respiratory syncytial virus (RSV) infection specifically in immunocompromised individuals. IDSA recommends that all individuals aged 18 years and older who are immunocompromised receive one dose of an RSV vaccine. This differs from AAFP guidance, which recommends vaccination for immunocompromised individuals aged 50 years and older, as well as for pregnant individuals.
IDSA’s recommendation is based on published, real-world evidence of vaccine efficacy in immunocompromised individuals, who were excluded from the original clinical trials for the vaccines. Because these recommendations are tailored to immunocompromised populations, including individuals with primary immunodeficiency (PI), the foundation recommends following IDSA guidance for RSV vaccination in adults rather than AAFP guidance. This guidance has been reviewed and endorsed by the foundation’s Medical Advisory Committee.
Note that IDSA also recommends shared clinical decision making for RSV vaccination in children under 18. Currently, standard RSV vaccines have been not approved by the Food and Drug Administration (FDA) for use in children, therefore, the foundation does not support this recommendation at this time.
A hub of information for journalists interested in writing about the Immune Deficiency Foundation with direct links to learn more about the organization, primary immunodeficiency, and those affected.
Learn more about Immune Deficiency FoundationThis 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.
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The Immune Deficiency Foundation improves the diagnosis, treatment, and quality of life for every person affected by primary immunodeficiency.
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