Interesting article.
I'm trying to think what the evolutionary advantage of this mode of action would be:
AAV-2 virus remains dormant in the body, but when infected with a cancer causing virus, the AAV-2 virus gets to replicate. It kills the cells infected by the cancer causing virus, sending it back into dormancy, but the host organism survives. Hmmm, a protective symbiosis.
I am going to have to find out a little more about this. Thanks for posting this.