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Vaccines could be coming for issues we traditionally could not vaccinate against.’ HOW CAN A VACCINE TREAT CANCERS OR CHRONIC INFECTIOUS DISEASES? T cell responses are very important for identifying cells infected with chronic diseases and aberrant cancer cells. They also play a big role in eliminating these cells from the body. When a cell becomes cancerous, it starts producing neoantigens. In normal cases, the immune system detects these neoantigens, recognizes that something’s wrong with the cell and eliminates it. The reason some people get tumors is that their immune system isn’t quite capable of eliminating the tumor cells, so...