Immunodeficiency syndromes are conditions where the immune system is weakened, making the body more susceptible to infections. These syndromes can be either primary, caused by genetic factors, or secondary, resulting from external factors like infections or medications. Individuals with immunodeficiency syndromes may experience frequent infections, delayed recovery, and complications from common illnesses. Treatment often involves managing infections and, in some cases, therapies to boost the immune system, such as immunoglobulin therapy or bone marrow transplants. Early diagnosis and intervention are crucial for improving outcomes.