UMass Amherst scientists created a nanoparticle “super adjuvant” vaccine that prevented melanoma, pancreatic, and breast cancers in mice. The innovation primes the immune system for lasting, body-wide protection against cancer spread. Credit: Shutterstock Researchers at the University of Massachusetts Amherst have shown that their nanoparticle-based vaccine can successfully prevent several aggressive cancers in mice, including melanoma, pancreatic cancer, and triple-negative breast cancer.