Americans' concern about disease has wildly fluctuated
                                
                                
                                    (Newser) -
                                    When Americans learned about the Ebola outbreak in March, they weren't too concerned; then, "from August to October, it was the apocalypse," a researcher tells  Politifact . Now, they say it was "overhyped," he notes. Indeed, when a  US health worker  arrived for treatment in the...