Primary Immunodeficiency Diseases (PIDD) are chronic illnesses causes by hereditary or genetic defects in the immune system that make the immune system not function properly. Throughout their lives, people with PIDDs are more susceptible to infections, endure recurrent health problems, and may develop serious long-term illness. Signs and symptoms of a PIDD can include: delayed growth and development, blood disorders, digestive problems, and autoimmune disorders. Talk to a doctor at John Bell Health Center if you experience frequent or sever infections that don’t respond to treatments; early diagnosis and treatment can prevent infections that can cause long-term problems.