There are several types of PIDs, each impacting different parts of the immune system. Some of the most common types include:
- Severe Combined Immunodeficiency (SCID): Characterized by the severe impairment of both T and B cells. - Common Variable Immunodeficiency (CVID): Leads to low levels of serum immunoglobulins and recurrent infections. - X-linked Agammaglobulinemia (XLA): Results in the absence of B cells and low levels of antibodies. - Chronic Granulomatous Disease (CGD): Affects the ability of phagocytes to kill certain bacteria and fungi. - DiGeorge Syndrome: Caused by a deletion on chromosome 22, leading to thymic hypoplasia and T cell deficiency.
