The document discusses immunotherapy, which uses substances to stimulate the immune system to prevent or treat diseases like cancer. It can be used to treat cancers of the melanoma, lung, kidney and bladder. Common side effects include fatigue, fever, chills, nausea and vomiting. Types of immunotherapy discussed include monoclonal antibodies, immune checkpoint inhibitors, and cancer vaccines. The document also discusses inflammation, hemorrhage, opportunistic infections, urticaria and their causes and symptoms.