British Health Secretary Andy Burnham, left, and the Government's chief medical officer Liam Donaldson watch as Senior Clinical Practice Facilitator Anne Cantarella, center, is given a swine flu vaccination at the University College London Hospital, London as a mass immunization program began Wednesday Oct. 21, 2009. The program, offering more than 11 million people the vaccine, began with hospitals immunizing frontline healthcare workers and their patients who fall into at-risk categories. (AP Photo/Lewis Whyld, Pool)