“Today, armed with a growing understanding of how to manipulate the immune system, researchers are offering the glimmer of a hope that cancer vaccines could soon become part of the cancer-fighting arsenal. More than 50 cancer vaccines are being tested in the United States, Canada, and Europe against several types of cancers, including melanoma and kidney, lung, breast, and prostate cancers. Several are in the final stages of human trials, at least two of which are expected to conclude within a year. In some of the trials, a few patients have seen their cancers go into remission, while in other patients, the vaccine slowed the spread of the disease. If all goes well, the first cancer vaccine could be ready for general use in three to five years.” MIT Technology Review