The attempt to expel the director of the Centers for Disease Control and Prevention (CDC) and the resignations of four high -profile officials on Wednesday were the last developments in the agitation that has been affecting the Federal Health Agency.
In recent months, CDCs have seen several resignations, mass layoffs, key committees and important changes in vaccine policy.
In the center is the Secretary of Health and Human Services (HHS) Robert F. Kennedy Jr., who has claimed that he wants to restore confidence in CDC and eliminate the alleged corruption.
Here is a timeline of the changes that have occurred in the CDCs.
Balance holes are observed in Windows at the global centers for nursing control headquarters (CDC) after a shooting that left two dead, on August 9, 2025 in Atlanta, Georgia.
Elijah Nouvelage/Getty Images
November 22, 2024
The then elected president Donald Trump pays attention to Dr. Dave Weldon to direct the CDC.
January 23, 2025
Trump selects Susan Monarez to be an interim director of the CDC.
Susan Monaz, nominated, will be the director of the Centers for the Control and Prevention of Diseases testifies during their confirmation hearing before the Senate Committee on Health, Education, Work and Pensions, on June 25, 2025 in Washington.
Kayla Bartkowski/Getty Images
February 18, 2025
Dr. Nirav Shah, the main deputy director of the CDC, resign, saying that he made the decision to go independently, according to local reports. Shah directed the response of the avian flu of the CDC.
March 13, 2025
The White House withdraws the Weldon nomination for the director of the CDC before its appearance before the Health, Education, Labor and Pensions (Help) Committee (aid) of the Senate because it did not have the votes to be confirmed.
Weldon was expected to get rid of his previous comments that question the safety of vaccines, as falsely suggesting that vaccines are linked to autism.
Former Congressman Dr. David Weldon speaks in the villages, Florida, on May 31, 2012.
Brendan Farrington/AP
March 24, 2025
Monarch is nominated by Trump to be director of the CDC. The President Write about social truth that she brings “decades of experience that defend innovation, transparency and strong public health systems.”
March 25, 2025
Five officials of the high -level CDCs depart from the agency, in a movement described as “retirement”, according to the Associated press.
The outputs included:
- Leslie Ann Dauphin, founding director of the National Center for Infrastructure and Labor Force of the National Center for Public Health, Tribal, Local and Territorial.
- Karen Remery, director of the National Center on Birth Defects and Disabilities of Development.
- Sam Posner, head of the Office of Sciences.
- Debra Lubar, Operations Director.
- Leandris Liburd, interim director of the Office of Health Equity.
April 1, 2025
Mass layoffs begin in HHS, affecting more than 10,000 people. This includes around 2,400 CDC employees, which is approximately a fifth of the workforce.
April 3, 2025
Kennedy announces that some programs and employees would be reinstated because they were cut by mistake. This includes the division in the CDC that manages the main surveillance.
It is later revealed that the HHS hired more than 450 CDC employees who had been dismissed.
May 27, 2025
Kennedy announced that CDCs will no longer recommend the COVID-19 vaccine for “healthy children and pregnant women.”
The posterior CDC updates the guide to a “shared clinical decision making” model, leaving the decision to vaccinate between patients or parents and a doctor.
June 5, 2025
Dr. Lakshmi Panagiotakopoulos, which supervised the recommendations of the CDC for COVID-19 vaccines, renounce after mixed messages about who would be eligible for vaccines.
June 9, 2025
Kennedy eliminates the 17 members of the CDC vaccine advisory panel, the Immunization Practices Advisory Committee (ACIP), which makes recommendations on safety, efficacy and clinical need for vaccines.
Kennedy says that replacing the members of the Committee of Sellings would help restore public trust and affirm that they were plagued by conflicts of interest.
The Secretary of Health and Human Services, Robert F. Kennedy Jr., speaks during a cabinet meeting with President Donald Trump in the White House Cabinet Room in Washington, on August 26, 2025.
Mandel and/AFP
June 11, 2025
Kennedy designates eight members selected by hand to sit in the ACIP, including some who have expressed vaccine views.
June 16, 2025
Dr. Fiona Havers, who directed the hospitalizations of the CVID-19 and RSV CDC, renunciation, citing concerns about how the data could be used to shape the national vaccine policy, according to Reuters.
June 25, 2025
At the first Acip meeting since Kennedy replaced all members, the committee says he will review the current child immunization program.
June 26, 2025
ACIP recommends a RSV monoclonal antibody shot for babies, but recommends against flu vaccines that contain the conservative thimeries.
Timerosal is a mercury -based preservative, which is used to prevent microbial contamination of vaccines. Most flu vaccines currently used in the US.
July 29, 2025
The Senate confirms Monaz as director of the CDC by a 51-47 vote along the party lines.
She is the first CDC director who required Senate confirmation after Congress approved a law that requires it in 2022.
August 8, 2025
A gunman opens fire at the headquarters of the CDC in Atlanta, resulting in the death of a police officer. The researchers and sources close to the gunman later said he was housing a complaint of years against the COVID-19 vaccine.
August 12, 2025
Monarez sends a note to the more than 10,000 employees of the company, linking the wrong information with the deadly shooting in the CDCs.
August 27, 2025
HHS sends a publication about X that states that Monaz is “is no longer director” of the CDC.
The sources tell ABC News that Kennedy and Stefanie Spear, their main deputy director of Cabinet, asked Monaz to support the changes in the Covid vaccine policy and the layoffs of high -level staff, a source familiar with the conversations told ABC News, to which Monaz did not commit.
Lawyers for the state of Monaz will not leave its position and that, because it was appointed by Congress, Trump has to say goodbye personally.
The White House, which has the authority to dismiss Monarch, followed on Wednesday night with a statement that said that Monarch was “finished.”
After the HHS statement about Monarrez’s departure, four other officials of his CDC career also renounce:
- Dr. Deb Houry, Medical Director and Deputy Director of Program and Science.
- Dr. Dan Jernigan, director of the National Center for Emerging and Zoonotic Infectious Diseases.
- Dr. Demetre Daskalakis, Director of the National Center for Immunization and Respiratory Diseases.
- Dr. Jennifer Layden, Director of the Office of Public Health, Surveillance and Technology Data.
In an exit email to colleagues, Daskalakis writes that he will no longer serve in his role “due to the continuous navy of public health.”
Agitation in CDC
Cdc.gov, hhs.gov, whitehouse.gov
August 28, 2025
Monarch’s lawyers say that he has not yet listened to the president directly on the matter and that he has had no more communications with the White House since the previous night.
The White House appointed the Undersecretary of Health and Human Services, Jim O’Neill, as an interim director on Thursday night.
ABC News’ Will McDuffie, Sony Salzman and Dr. Jade Cobern contributed to this report.
