Lyn Redwood, who spread debunked claims about vaccines, will be in the CDC's Immunization Safety Office, multiple CDC officials tell CBS News.

Robert F. Kennedy Jr. has repeated that not enough childhood vaccines have been tested in clinical trials against a placebo.

The newly formed vaccine advisory committee handpicked by Health and Human Services Secretary Robert F. Kennedy Jr. announced that it would examine the cumulative effect of the childhood vaccine schedule and reevaluate hepatitis B immunization recommendations — moves that could shift long-standing practices of how and when children are immunized in the United States.