Four senior officials with the Centers for Disease Control and Prevention announced their resignations in recent days, citing what they described as growing political interference in the agency's scientific work, particularly regarding vaccines.

Two of them — Debra Houry, the CDC's chief science and medical officer, and Demetre Daskalakis, who led the National Center for Immunization and Respiratory Diseases — stepped down on Wednesday, hours after the White House announced the firing of CDC Director Susan Monarez. MORE : For some, Overdose Awareness Day is more than a remembrance. It's a way to protest the city's approach to the crisis

Monarez, confirmed by the Senate in late July, was removed less than a month into her tenure. White House spokesperson Kush Desai said Monarez "was no

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