User:Amgutier99/sandbox

The term "cancer vaccine" is actually a misnomer. In a strict definition a vaccine is an immunogen delivered to prevent disease which is caused by a biological agent, such as a virus or bacteria. A "cancer vaccine" is typically immununotherapy delivered to treat a pre-existing cancer. The immunotherapy can have several forms: a cancer peptide (protein), autologous T cells, heterologous T cells, engineered T cells, gene therapy or any other agent (usually biological) that may enhance or change the immune response to the cancer cells/tumor. As a separate note there are vaccine that protect against certain viral or bacterial infections that lead to cancer, these include Gardasil, Hepatitis vaccines. However, these are not "cancer vaccines" these are vaccines that protect against a biological agent that can cause cancer.