BERLIN – OCTOBER 26: Doctor Silke Fruehmorgen injects a H1N1 swine flu vaccination in the arm of a colleague at the Charite clinical center on October 26, 2009 in Berlin, Germany. German officials have begun a mass immunization by offering the vaccine to policemen, firefighters, medical personnel and other people who work in the health or rescue services across Germany. The rest of the population will be receiving the vaccine in approximately 7 days. (Photo by Andreas Rentz/Getty Images)