TY - CHAP M1 - Book, Section TI - Evaluation of the Child with Suspected Immunodeficiency A1 - Sullivan, Kathleen E. A2 - Shah, Samir S. A2 - Kemper, Alex R. A2 - Ratner, Adam J. PY - 2019 T2 - Pediatric Infectious Diseases: Essentials for Practice, 2e AB - There are two basic types of immunodeficiency (also termed immune deficiency): (1) primary and (2) acquired or secondary. Primary immuno­deficiencies are a class of disorders in which there is an intrinsic defect in the immune system. In contrast, acquired or secondary immunodeficiency states occur as a consequence of external agents such as infection or chemotherapy. Over 300 distinct primary immunodeficiency syndromes have been recognized. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/28 UR - accesspediatrics.mhmedical.com/content.aspx?aid=1157323908 ER -