It was Kaposi’s sarcoma, a rare form of skin cancer This patient also has lymph node swelling and exhaustion. In November 1980, a Los Angeles immunolo-gist examined a young man who had diseases linked to immune system malfunc-tions. The doctor had a T-cell count taken of the patient’s bold. T-cell are a type of white blood cell that a key role in immune responses. The patient had no helper T-cell