Perhaps these doctors of yesteryear weren't so far off the mark. These days, cancer vaccines have been enjoying a surge of popularity as promising weapons in the war against cancer. Vaccines may one day prove even better than chemotherapy for the treatment of certain cancers. It's only been since the late 1970s, when we really learned a lot about the immune system, that people have been able to target the immune response to tumors.
Most cancer vaccines are in their infancy.