A universal vaccine for cancer may actually be in sight. Can we all just take a minute to process this please? YAASS. An illness that wreaks havoc on countless lives could soon be a thing of history textbooks, due to genius efforts of a group of international researchers. The scientists have created a vaccine that essentially causes the immune system to recognize the tumor as a virus and attack it—a practice called cancer immunotherapy. The vaccine greatly reduced size of aggressive tumors in mice, and showed promising results in advanced stage patients—either reducing or halting tumor growth, and likely preventing relapse after tumor removal. The cherries atop this potential medical triumph are the relatively benign side effects and inexpensive vaccine production costs.