Complement Deficiency, also known as hereditary complement deficiency diseases, is related to immunodeficiency due to a classical component pathway complement deficiency and immunodeficiency due to a late component of complement deficiency. An important gene associated with Complement Deficiency is CFP (Complement Factor Properdin), and among its related pathways/superpathways are Innate Immune System and Complement cascade. The drugs Lactitol and Vaccines have been mentioned in the context of this disorder. Affiliated tissues include liver and myeloid, and related phenotypes are Reduced mammosphere formation and homeostasis/metabolism