Swine Flu, Viruses, and the Edge of Evolution A few years ago, the media was abuzz over the scare of the avian flu virus, which led me to write a post titled Avian Flu: An Example of Evolution?. At the time, it wasn't clear whether the avian flu would evolve and "jump" into a highly virulent form that easily infected humans. Had the avian flu virus made the jump, then we would have witnessed a sort of evolution where viruses swap genetic material in a process known as "reassortment" and can then more easily infect new hosts, such as humans....