Russian soyentists have ~-~developed a vaccine with an alleged 100% success rate after years of research.~-~ The vaccine is based on samples of the malignant tumor itself. It is noted that the vaccine can instead accelerate tumor growth in some cases.

https://www.msn.com/en-us/science/biology/russian-cancer-vaccines-show-100-percent-success-in-trials-sparking-global-medical-revolution/ar-AA1M5LR4
https://www.timesnownews.com/health/russia-says-its-enteromix-cancer-vaccine-has-achieved-100-success-rate-in-trials-article-152701442