Is There a Risk of Indogenous Retro Viruses in Humans?

In the nineties, concerns were raised that transplanted organs would contain what's known as indogenous retro viruss. The worry is that if you put a pig organ and the rest of the human organs into the same body, will there be an opportunity for those viruses to recombine? But jamie locke says those fears have largely gone away from our perspective. She adds: "We think that it has been overcome"