A vaccine using tiny particles has been shown to effectively prevent melanoma, pancreatic and triple-negative breast cancer in mice. The study—led from the University of Massachusetts Amherst—demonstrated that 88 percent of vaccinated mice remained tumor-free (depending on the cancer type in question) and the vaccine reduced the cancer’s spread. In some cases, it completely prevented metastasis. “By engineering these nanoparticles to activate the immune system via multi-pathway activation that