Immunodeficiency diseases are categorized into primary and secondary immunodeficiency diseases. There is still no cure for primary and secondary immunodeficiency diseases. 1. Primary immunodeficiency diseases are mainly related to heredity and the lack of antibodies or cellular immunity in the human body. Most of the treatments can only control the condition, and when an infection occurs in the body, only antiviral and anti-inflammatory drugs can be taken under the guidance of a doctor, and there is no cure for primary immunodeficiency diseases at the present time. 2. Secondary immunodeficiency diseases are commonly caused by infections (e.g. HIV infection). Immunodeficiency diseases caused by HIV infection require long-term antiviral treatment, and there is currently no cure. When a patient is diagnosed with an immunodeficiency disease, it is recommended that he or she go to the hospital in a timely manner and actively cooperate with the doctor for treatment.