A sadly common question I get asked too frequently is "What virus can turn someone into a zombie?" The answer is that no virus can turn one into a zombie anymore than it can turn one into unicorn. However, if I were to name a disease that causes a person to behave in a manner that might be zombie-like, I would say it is the illness caused by the bat-borne rabies virus. For a great historical treatment of the mystique surrounding the illness see Rabid: A Cultural History of the World's Most Diabolical Virus.
Rabies is a disease that evokes, to those who are familiar with it, fear and was an infection that the great Louis Pasteur trained his genius mind on to formulate a vaccine: the subject of my favorite children's book. In the US, just two human cases occurred in 2010 and most animal cases are in wildlife, though it is important to remember that cats are one of the more common domestic species to contract rabies (see this video of a zombie-like rabid cat). Once infection has set in, only 5 people are known to have survived despite the Herculean Milwaukee Protocol that has been developed in recent years. Rabies in humans, because of its severity and transmission characteristics (blood/body fluid) in humans it is rarely transmitted human-to-human, though organ transplantation is one potential route.
Not a chance.
New lineages of viruses evolve naturally and rarely confer wholly new transmission characteristics. What is likely is that since the ultimate reservoir for rabies are the exceedingly prolific bat species, we know only a small fraction about all the strains of rabies that circulate amongst them. This poor rabid fox likely came into contact with a bat and acquired the new strain providing an opportunity to study the virus.
Sorry to disappoint but no zombie apocalypse in the offing...yet.