Ousted Centers for Disease Control and Prevention Director Susan Monarez told the Senate on Wednesday that the Trump administration plans to change the childhood vaccine schedule and fired her over her refusal to go along.

Monarez, who was fired on Aug. 27, less than a month after being sworn in, told the Senate Committee on Health, Education, Labor and Pensions that Health and Human Services Secretary Robert F. Kennedy Jr. required her to preapprove the changes to the childhood vaccine schedule.

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Committee Chairman Sen. Bill Cassidy (R-LA) pressed Monarez on the timeline of her firing. Monarez said tensions began in early August with media reports that the Advisory Committee on Immunization Practices would be examining requirements for childhood vaccines.

Kennedy picked the members of the ACIP before Monarez’s confirmation.

Monarez told Cassidy that he demanded she provide “blanket approval” for any changes to the childhood vaccine schedule made by ACIP, regardless of scientific evidence, following its September meeting, scheduled for Thursday and Friday.

Monarez said Kennedy told her on Aug. 25 that the CDC had never provided any data on the safety and efficacy of the current vaccine schedule and, therefore, that she needed to approve decisions from ACIP regarding all changes.

“He just wanted blanket approval, and if I could not commit to approval of each and every one of the recommendations that would be forthcoming, I needed to resign,” Monarez said. “I did not resign, and that is when he told me he had already spoken to the White House about having me removed.”

Monarez also said Kennedy told her that he spoke with President Donald Trump “every day” about changing the childhood vaccine schedule.

The ousted director also told Cassidy that Kennedy requested that Monarez meet with Aaron Siri, an attorney who has worked with Kennedy on vaccine injury lawsuits and has petitioned for the revocation of the approval of the polio vaccine.

This is a developing story and will be updated.