A cancer vaccine can help the immune system recognize cancer cells and fight against them. However, there are various terms for cancer vaccines, including cancer immunotherapy, cancer vaccination, cancer immunization, cancer prophylactic, and cancer preventive vaccine. These terms are interchangeable and refer to a form of treatment that aims to prevent cancer or slow down its progression. Another term associated with cancer vaccines is immunogen therapy, which involves administering immunogens (antigens that trigger an immune response) to stimulate the immune system to attack cancer cells. Regardless of the terminology used, the ultimate goal of cancer vaccines is to harness the power of the immune system to fight cancer.