New York health officials say infection originated in a vaccine
                                
                                
                                    (Newser) -
                                    A case of polio has been confirmed in New York state, the health department announced Thursday. The infected person has a type 2 vaccine-derived poliovirus,  STAT News  reports. The department gave the source as an oral polio vaccine, which hasn't been used in the US since 2000. Other countries...