...Michael Osterholm, an infectious diseases expert at the University of Minnesota, warned the virus could be adapting into a more transmissible form. "At any moment the fire hydrant of human-to-human transmission cases could open," he said. "This is definitely a 'stay tuned' moment." He noted that before SARS sparked a worldwide epidemic, there were a handful of human-to-human cases, until something happened, like a virus mutation, which triggered an explosion of cases...
http://www.usatoday.com/story/news/world/2013/02/11/sars-linked-virus/1909415/
