Cancer vaccines of any sort generally fall under the broader category of immunotherapy. Vaccines are best described as medicines that are designed to boost the body's natural immune system and protect it against bacteria or viruses that can cause disease. Most individuals are familiar with the vaccines that are administered to babies or young children. They are given to stop the development of certain diseases like whooping cough and tetanus. Cancer vaccines can do that, too; however, there are others that are also designed to keep an existing...