The immune system then recognizes these antigens and can mount a potent secondary assault on the remaining tumor. Bryan Choi More Quotes by Bryan Choi More Quotes From Bryan Choi It's truly astounding that a scourge of the last century has reemerged through scientific innovation to offer so many people hope. Bryan Choi health-news Perhaps the most promising aspect is the ability for this modified virus to not only directly kill brain cancer cells but to release tumor antigens. Bryan Choi health-news