Until she resigned a few days ago, Dr. Lakshmi Panagiotakopoulos worked with the committee that recommends vaccinations at the Atlanta-based CDC.

Kennedy also gleefully said he was revoking recommendations for vaccinating healthy children. But the CDC's edited immunization schedule did not remove the recommendation outright; rather, it simply added a stipulation that a child's doctor and parents agree on the vaccination, described as "shared clinical decision-making."