Ralph Abraham Named CDC Principal Deputy Director | CDC Leadership Update

The Centers for Disease Control and Prevention (CDC) has a fresh Principal Deputy Director: Ralph Abraham, M.D. Sworn in by Health and Human Services Secretary Robert F. Kennedy, Jr. On December 15, 2025, Dr. Abraham officially began his duties at CDC headquarters in Atlanta on January 5, 2026. This appointment marks a significant moment for the agency as it aims to refocus on its core mission of infectious disease defense and transparency.

A Career Bridging Clinical Practice and Public Service

Dr. Abraham brings nearly three decades of medical experience to the role, most recently serving as the Surgeon General of Louisiana. His background is notably diverse, beginning with ten years practicing veterinary medicine after graduating from the Louisiana State University School of Veterinary Medicine. He later earned his M.D. From the Louisiana State University School of Medicine and transitioned into family medicine. This unique blend of experience could prove valuable as the CDC navigates complex public health challenges.

Beyond his clinical work, Dr. Abraham has also been involved in politics, representing Louisiana’s fifth congressional district in the U.S. House of Representatives from 2015 to 2021. During his time in Congress, he served on committees related to armed services, agriculture, and science and technology – areas that often intersect with public health preparedness and response.

Secretary Kennedy’s Vision for the CDC

The appointment of Dr. Abraham aligns with Secretary Kennedy’s stated goals for the CDC. Kennedy emphasized the agency’s “foremost duty” is to protect Americans from infectious diseases, and expressed confidence that Dr. Abraham possesses the “integrity, courage, and decades of medical experience” needed to restore public trust in the CDC. This comes after a period of scrutiny and calls for greater transparency within the agency.

Deputy Secretary and Acting CDC Director Jim O’Neill echoed this sentiment, stating the CDC has “turned a corner” and is now focused on its core mission. He also highlighted the agency’s commitment to advancing Kennedy’s broader mission of improving the health of the nation, and expressed enthusiasm for Dr. Abraham’s expertise in accelerating transparency.

A Focus on “Sound Science” and Transparency

Dr. Abraham himself has articulated a commitment to evidence-based decision-making. He stated that reforming the CDC requires prioritizing “sound science first – and checking our ideologies at the door.” This suggests a potential shift towards a more objective and data-driven approach to public health policy, which could be particularly relevant in areas where scientific consensus has been challenged or politicized.

Recent CDC Leadership Changes and Challenges

Dr. Abraham’s arrival at the CDC follows a period of leadership turnover. Just over a week before his start date, Jim O’Neill stepped down as Acting CDC Director and Deputy Health Secretary at the Department of Health and Human Services. This leaves the agency navigating a transition with new leadership at key positions.

The CDC also recently faced criticism regarding its handling of measles elimination status. Dr. Abraham previously stated that losing the United States’ measles elimination status is the “cost of doing business,” a comment that drew sharp criticism from public health advocates, particularly given the nearly 1,000 measles cases confirmed in 2025 and over 2,200 in 2024. Canada lost its measles elimination status in 2024 due to sustained transmission.

Past Controversies and Current Support

Dr. Abraham’s past positions have also drawn scrutiny. As Louisiana’s Surgeon General, he reportedly told the health department to stop promoting mass vaccination campaigns and did not publicly address a pertussis (whooping cough) outbreak for two months, despite the deaths of two infants. He has also advocated for the apply of ivermectin during the COVID-19 pandemic and questioned the universal birth dose of hepatitis B vaccine. It’s worth noting that the CDC recently stopped recommending a universal birth dose of the hepatitis B vaccine in December, a decision that followed decades of widespread vaccination and a 99% reduction in chronic hepatitis B infections.

Despite these past controversies, Dr. Abraham remains a supporter of Secretary Kennedy’s health initiatives. He recently clarified that his departure from the CDC, announced on February 23, 2026, was due to family health obligations and not related to his political views or health. He intends to return to his medical practice in Louisiana.

What Comes Next: A Period of Realignment

The CDC, under Dr. Abraham’s leadership, is expected to prioritize realigning with its core mission of infectious disease defense. This will likely involve a renewed focus on surveillance, prevention, and treatment of infectious diseases, as well as efforts to enhance transparency and public trust. The agency will also continue to advance Secretary Kennedy’s broader goals for improving the health of the nation. The immediate focus will be on filling the remaining leadership vacancies and ensuring a smooth transition as the CDC navigates ongoing public health challenges.