I think it is amazing how far science has advanced. Because of genetics, we are able to "resurrect" ancient viruses and learn more about the evolution of viral species. It is a bit of a scary concept to imagine ancient viruses returning to the current ecosystem. The ability of the virus to infect the plant also raises the question of whether the reindeer actually was infected from eating the plant, meaning that the virus could have been in a symbiotic relationship. Hopefully this type of genetics is well-maintained, controlled, and isolated to keep the public safe from possible unknown harms.