I love research like this. First they figure out how cytotoxic T lymphocytes kill tumor cells. Then they figured out how the tumor cells defended themselves against the T cells. Then they figured out a way to suppress the defense mechanism, and made the T cells work dramatically better. The problem is the defense mechanism is also used by normal dividing cells so in this case it might be difficult to create a drug to this vulnerability. But they are working on it and think they can ultimately solve the problem! I wish them luck.