She testified Wednesday before a U.S. Senate committee that she was dismissed because she would not pre-approve ACIP’s vaccine recommendations or fire career officials for no reason. However, according to CDC data, febrile seizures as a result of the MMRV vaccine were rare, occurring in about eight out of every 10,000 doses administered. Only a small percentage of young children in the U.S. — about 15% — receive the combined MMRV vaccine as a first dose. Kulldorf defended the decision to limit use of the MMRV vaccine, arguing that it would help restore trust in public health measures. A set of votes on hepatitis B recommendations was initially schedule for Thursday, but postponed shortly before the end of the day.