https://med.stanford.edu/news/all-news/2018/01/cancer-vacc...

http://stm.sciencemag.org/content/10/426/eaan4488

Injecting minute amounts of two immune-stimulating agents directly into solid tumors in mice can eliminate all traces of cancer in the animals, including distant, untreated metastases, according to a study by researchers at the Stanford University School of Medicine.