Immunodeficiencies are conditions where the immune system is weakened or not functioning properly, making it harder for the body to fight off infections and diseases. These can be either primary, caused by genetic factors, or secondary, resulting from external factors like infections, medications, or malnutrition. People with immunodeficiencies may experience frequent infections, delayed recovery, and increased susceptibility to certain illnesses. Common examples include HIV/AIDS, which weakens the immune system, and primary immunodeficiency disorders, which are inherited conditions affecting immune function. Early diagnosis and treatment are essential for managing these conditions effectively.