The emergence of these novel viral pathogens underscore the fact that we have entered into a brave new world of infectious diseases, some of which are far more likely to decimate humankind than a rogue asteroid or other cataclysmic event -Gerald Evans, Chair, Infectious Diseases, Queen’s University The 21st Century sometimes seems like an era of free-floating anxiety. Television, radio and news media bathe our brains with stories of global warming, guns, terrorism, despots, and bizarrely unpleasant presidential candidates.