(CNN) — Dr. Susan Monarez, who was sworn in as director of the US Centers for Disease Control and Prevention on July 31, has been removed from the position, the White House said Wednesday.

Several high-level veteran agency officials resigned after word spread about her departure, leaving the CDC leaderless at a perilous time. HHS has not named an acting director to lead the CDC.

Morale, which was already low after deep staff cuts this spring, plummeted after a gunman opened fire on the CDC’s main campus in Atlanta on August 8, pocking the buildings with hundreds of bullet holes and killing DeKalb County Police Officer David Rose. Shortly afterward, a further 600 employees got official termination notices.

The exiting agency leaders described censorship, communication failures and the w

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