The World Health Organization recognizes over 70 primary immunodeficiency diseases.

To learn more about the most common types of Primary Immunodeficiency, click the links below. This information comes from the Immune Deficiency Foundation Handbook.

• X-Linked Agammaglobulinemia (XLA)
  
• Common Variable Immunodeficiency (CVID)/ Hypogammaglobulinemia
• Hyper-IgM Syndrome
• Selective IgA Deficiency
• IgG Subclass Deficiency
• Severe Combined Immunodeficiency (SCID)
• Wiskott-Aldrich Syndrome
• DiGeorge Syndrome
• Ataxia-telangiectasia