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What is a primary immunodeficiency disease (PIDD)?

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In someone with a primary immunodeficiency disease (PIDD), the body has a harder time fighting germs that make people sick. You may get a lot of infections in the ears, lungs, skin, or other areas that take a long time to go away.

Most cases happen in babies or young children, but sometimes it doesn't show up until adulthood. There are many different types -- more than 200 -- and they affect different parts of the immune system. All make it more likely to get sick from infections.

From: Primary Immunodeficiency WebMD Medical Reference

Reviewed by Dan Brennan on September 11, 2018

Medically Reviewed on 09/11/2018

SOURCES:

American Academy of Asthma, Allergy and Immunology: "Primary Immunodeficiency Disease."

Boston Children's Hospital: "Primary Immunodeficiency."

CDC: "Newborn Screening: Severe Combined Immunodeficiency," "Severe Combined Immunodeficiency."

Children's Hospital of Wisconsin: "Bone Marrow Transplantation."

Immune Deficiency Foundation: "Patient & Family Handbook."

National Institute of Allergy and Infectious Diseases: "Primary Immunodeficiency Diseases."

Rare Diseases Clinical Research Network: "Learn More About Primary Immune Deficiency."

Cambridge University Hospitals: "Antibiotics for adults with primary immunodeficiency."

Reviewed by Dan Brennan on September 11, 2018

SOURCES:

American Academy of Asthma, Allergy and Immunology: "Primary Immunodeficiency Disease."

Boston Children's Hospital: "Primary Immunodeficiency."

CDC: "Newborn Screening: Severe Combined Immunodeficiency," "Severe Combined Immunodeficiency."

Children's Hospital of Wisconsin: "Bone Marrow Transplantation."

Immune Deficiency Foundation: "Patient & Family Handbook."

National Institute of Allergy and Infectious Diseases: "Primary Immunodeficiency Diseases."

Rare Diseases Clinical Research Network: "Learn More About Primary Immune Deficiency."

Cambridge University Hospitals: "Antibiotics for adults with primary immunodeficiency."

Reviewed by Dan Brennan on September 11, 2018

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