What is a characteristic of secondary immunodeficiency?

A characteristic of secondary immunodeficiency is that it is acquired through infections or medications. This type of immunodeficiency arises when the immune system becomes compromised due to external factors rather than being a result of genetic inheritance. Various conditions, such as HIV, certain cancers, and autoimmune diseases, can lead to secondary immunodeficiency by directly impacting the immune system. Additionally, treatments like chemotherapy and the use of immunosuppressive drugs can also weaken immune function, making the body less capable of fighting off infections. This contrasts with primary immunodeficiency, which is often present from birth and results from genetic mutations.