Click in for more news from The Hill{beacon} Health Care Health Care   The Big Story CDC bars expert groups from advising on vaccines The Centers for Disease Control and

Multiple medical groups say they have been barred from working on the Centers for Disease Control and Prevention's panel of vaccine advisers.

U.S. health officials have told more than a half-dozen of the nation's top medical organizations that they will no longer help establish vaccination recommendations. The government told the organizations on Thursday via email that their experts are being disinvited from the workgroups that have been the backbone of the Advisory Committee on Immunization Practices.