Military Bets on Mutant Pathogen to Fight Viruses...
Viruses grow by squirting their genes into a cell, which hijacks its protein-making machinery to produce the ingredients of viral copies. Diverted from its own normal functions, and sometimes burst apart by the viruses’ mass exit, the host cell usually dies.
Interesting approach. It's like adding a death-switch to a cell. These TIP's however should be designed in such way that they cannot exchange their genetic information with the attacking party to create a more effective virus I suppose. And should not have an off-target effect at all. I don't expect this to enter the market anytime soon, but it is always nice to read, experiment and speculate :P