Updated

U.S. Centers for Disease Control and Prevention Director Dr. Rochelle Walensky announced Friday she is stepping down from her role. 

The CDC said Walensky will leave the agency at the end of June.

"The end of the COVID-19 public health emergency marks a tremendous transition for our country, for public health, and in my tenure as CDC Director," Walensky wrote in her resignation letter to President Biden. "I took on this role, at your request, with the goal of leaving behind the dark days of the pandemic and moving CDC — and public health — forward into a much better and more trusted place."

Centers for Disease Control and Prevention (CDC) Director Rochelle Walensky

Centers for Disease Control and Prevention Director Rochelle Walensky. (REUTERS/Elizabeth Frantz)

The White House thanked Walensky for her service in a statement. 

"Dr. Walensky has saved lives with her steadfast and unwavering focus on the health of every American. As Director of the CDC, she led a complex organization on the front lines of a once-in-a-generation pandemic with honesty and integrity. She marshalled our finest scientists and public health experts to turn the tide on the urgent crises we’ve faced," President Biden said. 

The president added that Walensky "leaves CDC a stronger institution, better positioned to confront health threats and protect Americans. We have all benefited from her service and dedication to public health, and I wish her the best in her next chapter." 

The CDC said that under Walensky's watch, it "successfully addressed a multinational mpox outbreak, contained the spread of Ebola in Uganda, and responded to countless infectious disease threats in countries around the globe."

WALENSKY TELLS FOX NEWS IT'S ‘FRUSTRATING’ WHEN HEALTH DECISIONS ARE ‘POLITICAL’

CDC Director Rochelle Walensky wears a mask

Dr. Rochelle Walensky, director of Centers for Disease Control and Prevention, gives an opening statement during a Senate Health, Education, Labor and Pensions Committee hearing to examine the federal response to the coronavirus disease and new emerging variants at Capitol Hill in Washington, D.C., on Jan. 11, 2022. (Greg Nash/Pool via REUTERS)

"CDC launched a center for forecasting and outbreaks and secured hundreds of millions of dollars to begin modernizing our nation’s data infrastructure," it added.

Before joining the CDC, Walensky "served as Chief of the Division of Infectious Diseases at Massachusetts General Hospital from 2017-2020 and Professor of Medicine at Harvard Medical School from 2012-2020," it also said.

Throughout the COVID-19 pandemic, a culture war erupted with many calling into question the CDC's efforts to mitigate the spread of the virus as well as its insistence on vaccine mandates, asserting that such public health measures intrude on individual rights.

"What this pandemic taught us and showed us is that now we need to talk to the American people. We need to say what we know when we know and provide timely data and give people updates along the way. And yes, that also means telling people what we don't know as we're making decisions," Walensky told Fox News' Dr. Marc Siegel last year.

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Walensky CDC COVID-19 Panel

CDC Director Dr. Rochelle Walensky answers questions from reporters during a press conference in October 2021. (Courtesy White House YouTube channel)

Walensky also faced criticism after it emerged that she met with parents just one time leading up to the release of school reopening guidance in 2021, her internal calendar revealed.

Walensky stated several times that they had consulted parents' needs for the guidance despite her calendar showing the sole 30-minute meeting. And while parents were granted just one session, teacher unions had constant access to her and other high-level CDC officials while influencing last-minute changes to the guidelines. 

Fox News' Greg Norman, Sarah Rumpf-Whitten, Dr. Marc Siegel and Joe Schoffstall contributed to this report.