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Primary immunodeficiency diseases (PI) are a group of more than 400 rare, chronic disorders in which part of the body’s immune system is missing or functions improperly. 

While not contagious, these diseases are caused by hereditary or genetic defects, and, although some disorders present at birth or in early childhood, the disorders can affect anyone, regardless of age or gender. For that reason, IDF has created resources for people of all ages.

Visit our various lifestage sections by clicking the appropriate links below: