>Using a modified, harmless version of HIV, the virus that causes AIDS, they inserted a series of genes into the white blood cells. These were designed to make to cells target and kill the cancer cells. After growing a large batch of the genetically engineered white blood cells, the doctors injected them back into the patients.
[There are days when the world is stranger than I expected, and those are days like today.][link]
[link]: http://www.msnbc.msn.com/id/44090512/#.TkRaQWZWTd4 “New leukemia treatment exceeds ‘wildest expectations’ – Health – Cancer – msnbc.com”