Hodgkin's lymphoma is a type of cancer that affects the lymphatic system. It is characterized by swollen lymph nodes and symptoms like fever, night sweats, and weight loss. Doctors diagnose it through physical exams, blood tests, x-rays, and biopsy of lymph nodes. Treatment involves chemotherapy, radiation therapy, or both. The ELISA test is a blood test used to detect antibodies and determine if a person has been exposed to pathogens like HIV. It works by detecting antibodies that bind to specific antigens coated on a plate. Hives are red, raised welts on the skin caused by an allergic reaction that releases histamine. Common triggers are foods, medications, insects and emotional stress. Treatment focuses on