Health and Human Services Secretary Robert F. Kennedy Jr. raised his voice several times during back-to-back congressional hearings Wednesday as Democratic lawmakers pressed him on his past statements about vaccines and his actions as health secretary to reduce funding to vaccine programs.

HHS Secretary Robert F. Kennedy Jr. responded to a question on the measles vaccine by saying Americans should not take medical advice from him.

I’ve asked Marty Makary, who’s the director of the FDA, to do a complete review and report back,” Kennedy, a notorious skeptic and conspiracy theorist on vaccines and other public health matters, said of the medication during a Senate budget hearing Wednesday.