Poliovirus slaughters brain tumors in mice

Scientists have harnessed the killing power of a debilitating virus to slay

even more deadly foes–malignant brain tumors. In research on mice, Mattias M. Gromeier and his colleagues altered a live poliovirus, inducing it to attack and eliminate tumor cells in the animals’ brains.

The modification changes the virus just enough so that it can’t cause polio.