(NEW YORK) — Measles cases have topped 1,000 in the United States for the third time in 26 years.
At least 154 new measles cases have been confirmed in the last week for a total of 1,136, according to updated data from the Centers for Disease Control and Prevention (CDC).
This is a developing story. Please check back for updates.
Copyright © 2026, ABC Audio. All rights reserved.
(WASHINGTON) — President Donald Trump’s surgeon general nominee, Dr. Casey Means, indicated she supports vaccines but stopped short of recommending certain shots during her confirmation hearing before the Senate Health, Education, Labor and Pensions (HELP) committee on Wednesday.
Means, who has a medical degree but does not hold an active medical license, appeared hesitant to say that some vaccines, such as the flu vaccine, prevent serious disease.
When asked by HELP committee chair Sen. Bill Cassidy, R-La., if she would encourage mothers to vaccinate their children with the measles, mumps and rubella (MMR) vaccine amid widespread illness in the U.S., Means said, “I absolutely am supportive of the measles vaccine, and I do believe vaccines save lives and are important part of the public health strategy.”
However, she stressed personal autonomy and said each patient or parent needs to have a conversation with their doctor or pediatrician before taking any medication.
Later in the hearing, Sen. Tim Kaine, D-Va., asked Means for her opinion on the efficacy of the flu vaccine.
“Do you believe that there is evidence that the flu vaccine prevents serious disease and prevents hospitalization or deaths in children?” Kaine said.
“I believe that all patients should talk to their doctor–” Means began answering.
“And so do I, and that’s not what I’m asking,” Kaine interjected.
“I support the CDC’s guidance on the flu vaccine,” Means replied, adding that she believes the shot reduced the risk of hospitalization “at the population level.”
Earlier this year, the Centers for Disease Control and Prevention announced that it was changing the childhood immunization schedule, removing the universal recommendation for multiple shots, including the flu vaccine.
Means was originally scheduled to testify before the HELP committee in October, but her appearance was postponed for four months after she went into labor.
If confirmed, Means would become the nation’s top doctor, leading more than 6,000 members of the U.S. Public Health Service, including physicians, nurses, scientists and engineers working at various federal health agencies.
Means’ views largely mirror those of Health and Human Services Secretary Robert F. Kennedy Jr., with a focus on tackling the chronic disease epidemic, creating a healthier food supply and expressing vaccine skepticism.
This is a developing story. Check back for updates.
ABC News’ Youri Benadjaoud and Arthur Jones II contributed to this report.
Copyright © 2026, ABC Audio. All rights reserved.
(NEW YORK) — The number of women with risk factors for cardiovascular disease could significantly increase over the next 25 years, the American Heart Association (AHA) warned on Wednesday.
Without improving prevention and early detection tools, about six in 10 women could be diagnosed with hypertension or obesity by 2050, and risk factors could appear in children and teenagers as well, according to the AHA’s scientific statement.
“Cardiovascular disease is the leading cause of death, and fewer than half of women know that fact,” Dr. Stacey Rosen, executive director of Katz Institute for Women’s Health and volunteer president of the AHA, told ABC News. “And the percentage of awareness is even lower in African Americans and Hispanics.”
Published in the journal Circulation, the AHA’s projections suggest that 59.1% of women could have high blood pressure by 2050 — up from 48.6% in 2020 — even as diet, physical activity and smoking rates are projected to improve.
About one in four women may have diabetes in 2050, up from 14.9% in 2020, and more than 60% are estimated to have obesity, an increase from 43.9% over the same period, according to the report.
Heart health risk factors won’t hit all demographic groups of women equally, the report predicted.
High blood pressure will increase the most among Hispanic women with a projected rise of 15%, the report noted.
Additionally, more than 70% of Black women could have high blood pressure and obesity may increase the most among Asian women by nearly 26%.
Young women and girls may also see an increase in heart risk factors, partially driven by less opportunity for exercise as well as an abundance of inexpensive foods that often are not heart health.
Estimates also suggest that nearly one-third of girls between ages 2 and 19 will have obesity, an increase from 19.6% with obesity in 2020.
Dr. Jennifer Miao, a board-certified cardiologist, told ABC News that earlier hormonal changes in girls may also contribute to cardiovascular risk later in life.
“Several studies have also shown that starting menstruation at an early age can lead to increased risk of heart disease down the road,” she said.
Miao said she counsels parents that it’s never too early to start thinking of heart health for their children by “choosing good foods, physical activity over screen time and regular pediatrician check-ups.”
Despite the report’s predictions, Rosen stressed that meaningful progress for women’s heart health is still within reach.
“As a medical community, we have amazing tools to treat disease and detect it early, but lack when it comes to primary prevention,” Rosen said, adding that managing diseases like obesity requires a time intensive, multidisciplinary approach that the current U.S. health care system is not built to support.
She also said that optimizing health doesn’t require a costly gym membership or expensive organic foods.
“Every bit of movement counts, whether that means taking a walk or standing more if you work at a desk,” Rosen said.
Small, sustainable changes, like cutting back on sweetened beverages, can make a meaningful difference over time, she said.
Miao added that both the medical community and local leaders can do their part. By partnering with local health clinics, expanding home visit programs and leveraging telemedicine, health systems can extend their reach and bring essential care directly to isolated and underserved populations.
Takisha Morancy, MD, is a chief emergency medicine resident, medical ethics fellow and member of the ABC News Medical Unit.
Copyright © 2026, ABC Audio. All rights reserved.
(WASHINGTON) — President Donald Trump’s surgeon general nominee is appearing before the Senate on Wednesday for her confirmation hearing.
Dr. Casey Means was originally scheduled to testify before the Senate Health, Education, Labor and Pensions (HELP) committee in October, but it was postponed for four months after she went into labor.
If confirmed, Means would become the nation’s top doctor, leading more than 6,000 members of the U.S. Public Health Service, including physicians, nurses, scientists and engineers working at various federal health agencies.
Means’ views largely mirror those of Health and Human Services Secretary Robert F. Kennedy Jr., with a focus on tackling the chronic disease epidemic, creating a healthier food supply and expressing vaccine skepticism.
Senators are expected to grill Means on her qualifications as well as her business endeavors. In prior filings, Means pledged that, if confirmed, she would resign from her position as an adviser for a wellness company and promised to stop working as an influencer promoting supplements and other wellness products.
“Dr. Means would clearly be an atypical or unusual person to serve in the role of surgeon general,” Dr. Richard Besser, former acting director of the Centers for Disease Control and Prevention, told ABC News. “Typically, the surgeon general has been viewed as the nation’s top doctor or America’s doctor, but Dr. Means has never practiced medicine, and so that is unusual. The part that’s not unusual is that the surgeon general’s impact is largely through influence. Dr. Means is skilled in this regard, when it comes to influence.”
Means graduated from Stanford School of Medicine in 2014 with plans to become an otolaryngology surgeon, also known as a head and neck surgeon, but she dropped out in her fifth year, according to her website.
Means went on to study functional medicine, which uses a holistic approach to prevent disease and illness by studying the root causes of health issues. The field has been criticized for promoting some interventions that are not evidence-based and for an overreliance on expensive supplements. Having never completed residency, Means is not board-certified in a medical specialty, and she does not hold an active medical license.
Over the course of her career, she co-founded Levels, an app that allows people to track their food, along with biometric data like sleep and glucose monitoring, to see how their diet is impacting their health.
Means wrote a book with her brother, Calley Means, titled “Good Energy,” which was published in May 2024 and claims to take a look at why Americans are sick and how to fix it.
The siblings rose to prominence within the Trump campaign in 2024 and among Trump allies, including Kennedy. They appeared at a September 2024 roundtable discussion on health with Kennedy hosted by Sen. Ron Johnson, R-Wisc.
“The message I’m here to share and reiterate is that American health is getting destroyed,” Casey Means said during her opening remarks at the 2024 event. “It’s being destroyed because of chronic illness.”
Meanwhile, Calley Means currently serves as senior adviser for HHS. He has worked closely with Kennedy and has touted many of his health proposals. Calley Means has a Master of Business Administration degree from Harvard University and does not have medical training.
According to a copy of her prepared testimony for her original confirmation hearing in October, obtained by ABC News, Casey Means wrote that she would work to put “Americans back on the road toward wholeness and health.”
Like Kennedy, Casey Means has called for the removal of ultra-processed foods in school lunches and has advocated for organic foods and ingredients sourced from so-called regenerative farming practices in school meals.
In her “Good Energy” newsletter, she wrote that the U.S. needed to move away “from industrial agriculture that uses synthetic pesticides” in order to create “nutrient-rich food.”
“If she were to use the platform to truly work towards improving the school lunch program in America, that would be that would be terrific, because the Secretary talks a lot about nutrition, the importance of eating healthy food,” Besser said. “But if people can’t afford it, telling people to eat healthy food doesn’t lead to a healthier nation. and one of the ways that we could see big impact in that regard would be if the school lunch program were funded to the extent that every school could have a kitchen, and the people working in that kitchen could actually prepare real food, rather than handing out packaged food.”
While Casey Means’ nomination has received support from members of the administration, including Dr. Jay Bhattacharya, acting CDC acting director and head of the National Institutes of Health, others have expressed concern over some of her more controversial views.
On Tucker Carlson’s show in August 2024, Casey Means said birth control is being “prescribed like candy” and that Ozempic has a “stranglehold on the U.S. population.”
Means has expressed skepticism about the safety of childhood vaccines and has called for more research on the “safety of the cumulative effects” of vaccines when following the CDC vaccine schedule, she wrote in her newsletter.
“There is growing evidence that the total burden of the current extreme and growing vaccine schedule is causing health declines in vulnerable children. This needs to be investigated,” she continued.
Doctors and major medical organizations, such as the American Academy of Pediatrics, have said the previous childhood immunization schedule recommended by the CDC was safe and effective. The CDC recently changed the childhood immunization schedule, cutting the number of vaccines recommended for kids.
“I will be very eager to see whether the members of the health committee use this time to lift up concerns and to get Dr. Means’ perspective on the changes the Secretary has made to the vaccine system in America,” Besser said. “I’ll be interested to see if they ask Dr Means about her perspective on the changes that have taken place at CDC and the impact that these could have on health so that it’s clear coming in where she stands on the draconian cuts that the Secretary has made to our federal public health health system.”
She has also criticized the administration of hepatitis B vaccine among infants. The CDC recently removed the universal recommendation for a birth dose of the hepatitis B vaccine among babies in the U.S.
Kennedy said on Monday he is “excited” for Casey Means’ confirmation hearing and that the health department has been waiting “a long time” for her to join the team.
“We’ve been waiting for a long time for Dr. Means to come on board,” Kennedy told ABC News on Monday at the department’s rare disease therapies event. “We are very, very excited about her coming on board. She has an extraordinary capacity to communicate to the American public — that is the function of the surgeon general.”
ABC News’ Youri Benadjaoud and Arthur Jones II contributed to this report.
Copyright © 2026, ABC Audio. All rights reserved.
(NEW YORK) — U.S. childhood and teen obesity rates have reached record-highs while adult obesity rates may be slowing, according to two new reports published early Wednesday by the Centers for Disease Control and Prevention (CDC).
Researchers used measured heights and weights from the National Health and Nutrition Examination Survey (NHANES) — run by the CDC’s National Center for Health Statistics — to track trends over more than six decades.
In the first report, the team found that, in the most recent survey conducted between August 2021 and August 2023, 40.3% of adults aged 20 and older were found to be obese, including 9.7% with severe obesity and another 31.7% classified as overweight.
By comparison, for the survey conducted between 1988 and 1994, 22.9% adults aged 20 and older were found to be obese including 2.8% with severe obesity and 33.1% classified as overweight.
However, some of the newest estimates suggest the rapid rise seen in earlier decades may be slowing slightly.
In the 2017-2018 survey, 42.4% of adults were classified as obese, which is the highest figure ever recorded. The decrease between the two most recent surveys could be indicative of a downward trend. Dr. John Brownstein, an epidemiologist and chief innovation officer at Boston Children’s Hospital and an ABC News contributor, noted that it aligns with observations of electronic medical record data.
“So, we’re seeing, for the first time in decades, that there’s like a leveling off and even maybe a slight decrease and I think this is like challenging a major shift from the long-held expectation that obesity would just be climbing year after year,” he said.
According to Brownstein, the decrease is likely due to many factors including public health policies and education about healthier lifestyles as well as medications such as GLP-1s.
GLP-1s, or glucagon-like peptide-1 receptor agonists, mimic the GLP-1 hormone that is produced in the gut after eating.
It can help produce more insulin, which reduces blood sugar and therefore helps control Type 2 diabetes. It can also interact with the brain and signal a person to feel full, which — when coupled with diet and exercise — can help reduce weight in those who are overweight or obese.
Many GLP-1s have become household names, including Ozempic, Wegovy, Mounjaro, Zepbound and Trulicity.
“I do think the advent of the GLP-1s are absolutely playing a role,” Brownstein said. “At that point in 2023, they weren’t as widespread as they are today. So, we expect that these factors could play even more significant role in more recent times.”
Dr. Justin Ryder, an associate professor of surgery and pediatrics at Northwestern Feinberg School of Medicine, said he’s cautiously optimistic about the slight decrease.
However, he added that it remains to be seen whether this is a blip or if the decrease is indicative of a longer-term trend.
“We’ve seen dips in the past and typically, when they do, in the next reporting period it goes right back up,” Ryder told ABC News. “And that’s because of how the sampling is done. This is a random sample of U.S. adults.”
He noted that the random sampling makes it difficult to draw firm conclusions.
“Could it just be the people who were sampled, or is it real?” he said. “And I think we won’t know that until we have another set or a larger set of data over either the same sampling period or a couple more years from now.”
Meanwhile, a second report found that more than one in five U.S. children and teenagers have obesity, which is the highest figure ever recorded.
The survey conducted between August 2021 and August 2023 found 21.1% of U.S. children and teenagers between ages 2 and 19 have obesity, up from 5.2% during the 1971-1974 survey.
Additionally, 7% of children live with severe obesity, an increase from the 1% seen 50 years ago, according to the report.
“This is exceptionally concerning,” Dr. David Ludwig, co-director of the New Balance Foundation Obesity Prevention Center at Boston Children’s Hospital and professor of nutrition at Harvard School of Public Health, told ABC News.
He added that in the 1970s, “children were certainly recognized [as obese] but it was the rare child, one in 20. And now we’re looking at one in five children with obesity.”
Ludwig said it had seemed for a short period of time that the prevalence of obesity was decreasing at least among 2-to-5-year-olds when rates declined from 12.1% in 2009-2010 to 9.4% in 2013-2014.
At the time, he viewed it as a “glimmer of hope” — but rates increased again and now sit at 14.9% for this age group.
“We saw that dip and we all got excited thinking that we were beginning to turn the tide,” Ludwig said. “In retrospect, that was more of a statistical aberration, more of mirage than a true glimmer of hope because the trend overall has continued upward.”
To reverse the trends among children, Ryder said the 2-to-5-year-old group will need lifestyle modifications such as healthier eating. The 6-to-11-year-old group will need similar methods although some medications are available, he said.
For children above age 12, Ryder said medications and bariatric surgery are options.
Nearly 23% of children ages 12 to 19 were considered obese in the most recent survey. Ryder said that means they meet the guidelines for intensive treatment, whether that’s lifestyle adjustments or in combination with medications or surgery.
“I think the only way that we’re going to see a downward trend in that number is if we take that adolescent group of 12- to 19-year-olds and actually start to apply the clinical practice guidelines and treat those kids seriously, offering them medications,” he said.
Ishani D. Premaratne, MD, is an integrated plastic & reconstructive surgery resident and member of the ABC News Medical Unit.
Copyright © 2026, ABC Audio. All rights reserved.
(NEW YORK) — The U.S. is close to reaching at least 1,000 measles cases for the third time in eight years.
At least 72 new measles cases have been confirmed in the last week, according to updated data from the Centers for Disease Control and Prevention.
So far this year, there have been total of 982 cases in 26 states, including Arizona, California, Colorado, Florida, Georgia, Idaho, Illinois, Kentucky, Maine, Minnesota, Nebraska, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, South Carolina, South Dakota, Texas, Utah, Vermont, Virginia, Washington and Wisconsin.
Just six measles cases were reported among international travelers so far this year, according to CDC data.
About 94% of cases are among people who are unvaccinated or whose vaccination status is unknown, the CDC said.
Meanwhile, 3% of cases are among those who have received just one dose of the measles, mumps, rubella (MMR) vaccine and 4% of cases are among those who received the recommended two doses, according to the CDC.
The current measles situation in the U.S. is partly being driven by a large outbreak in South Carolina that began last year, with 962 cases recorded as of Friday, according to state health officials.
Last year, the U.S. recorded 2,281 measles cases, which is the highest number of national cases in 33 years, according to the CDC.
It also marked the first U.S. deaths recorded from measles in a decade, two among school-aged unvaccinated children in Texas and a third among an unvaccinated adult in New Mexico.
The CDC currently recommends people receive two doses of the MMR vaccine, the first at ages 12 to 15 months and the second between 4 and 6 years old. One dose is 93% effective, and two doses are 97% effective against measles, the CDC said.
However, federal data shows vaccination rates have been lagging in recent years. During the 2024-2025 school year, 92.5% of kindergartners received the MMR vaccine, according to data. This is lower than the 92.7% seen in the previous school year and the 95.2% seen in the 2019-2020 school year, before the COVID-19 pandemic.
Last month marked one year since a measles outbreak began in West Texas, with infections soon spreading to neighboring counties and other states.
Public health experts previously told ABC News that if cases in other states are found to be linked to the cases in Texas, it would mean the virus has been spreading for a year, which could lead to a loss of elimination status.
Copyright © 2026, ABC Audio. All rights reserved.
(NEW YORK) — Two bills having to do with abortion are making their way through the Wyoming legislature.
The first bill, HB0126, dubbed the Human Heartbeat Act, prohibits abortion if cardiac activity is detected in the fetus, which is around six weeks of pregnancy, before many women know they’re pregnant.
If cardiac activity is detected, an abortion can only be performed in the case of a medical emergency, meaning if the life of the mother is in danger or if continuing the pregnancy would cause serious or irreversible impairment of a major bodily function, according to the bill, which does not include exceptions for women impregnated as a result of rape or incest.
Any person who intentionally or knowingly violates the act will be charged with a felony punishable by up to five years in prison, a fine of up to $10,000, or both, according to the bill.
“What this bill attempts to do is to provide a line in the sand,” Republican Speaker of the House Rep. Chip Neiman said at a Wyoming House Labor, Health & Social Services Committee meeting on Monday. “This gives the unborn child the right to be protected and the privilege of being carried to term after a fetal heartbeat is detected.”
The bill also asserts that “substantial medical evidence” shows that a fetus can experience pain by 15 weeks of gestation.
“The science conclusively establishes that a human fetus does not have the capacity to experience pain until after at least 24–25 weeks,” according to the American College of Obstetricians & Gynecologists (ACOG).
The other bill, HB 117 or “Stop harm-empower women with informed notices,” requires medical professionals to give pregnant women written notices before performing an abortion.
The notice would include a description of the proposed abortion method, if there are medical risks associated with the method, alternatives such as adoption and parenting, and the medical risks associated with carrying the fetus to term
Patients who feel they’ve been coerced into receiving an abortion would be allowed to sue any providers for not less than $25,000.
The bill also includes text about the abortion drug mifepristone, including putting in the written notice that mifepristone alone is not always effective in ending a pregnancy. The written notice must also include that pregnant women should consult a health care provider if, after taking mifepristone, they regret their decision “to determine if there are options available to assist her in continuing her pregnancy.”
ACOG states that medication abortion “reversal” is not supported by science and that so-called reversal procedures are “unproven and unethical.”
Earlier this week, the Wyoming House Labor, Health & Social Services Committee recommended that both bills be passed. The bills will now go to the Wyoming State House for debate, amendment and voting.
Currently, abortion is allowed in Wyoming until fetal viability, which occurs at around 25 weeks of gestation, according to ACOG, defined as a fetus’ chances of surviving outside of the womb.
Only physicians are allowed to provide abortions in Wyoming, and they are required to submit a report to the Wyoming Department of Health within 20 days of any abortion procedure, according to the Guttmacher Institute, a research group that focuses on sexual and reproductive health.
In 2023, Wyoming passed two abortion bans. However, the Wyoming Supreme Court ruled in January that the bans were unconstitutional, violating a “health care freedom” amendment to the state constitution that was passed in 2012 that states in part that “each competent adult shall have the right to make his or her own health care decisions,” and that “the parent, guardian or legal representative of any other natural person shall have the right to make health care decisions for that person.”
During his State of the State address earlier this month, Wyoming Gov. Mark Gordon suggested that voters should decide on the issue.
“There’s another arduous task that I bring before you, which is the issue of abortion,” he said. “Protecting life is the most serious responsibility entrusted to government. The question of abortion deserves careful deliberation and I urge this legislature to take up this issue earnestly and put forward a genuine solution to the voters of Wyoming that provides a clear, irrefutable, durable, and morally sound resolution to this fraught issue.”
Copyright © 2026, ABC Audio. All rights reserved.
(NEW YORK) — A Texas appeals court will hear arguments on Thursday in a civil lawsuit brought against a woman accused by the state of illegally providing abortions in the Houston area.
Maria Margarita Rojas allegedly provided abortions in violation of the state’s abortion ban and was practicing medicine without a license at a network of clinics in northwestern Houston, according to Texas Attorney General Ken Paxton.
Last year, a lower court in Waller County issued an injunction against Rojas and the three clinics at which she worked, causing them to shut down.
The Center for Reproductive Rights is currently asking the appellate court to reverse that decision.
Meanwhile, prosecutors have also accused Rojas of violating the state’s abortion ban and charged her with a first-degree felony that carries a potential sentence of up to life in prison.
“[Paxton] is accusing our client of basically operating abortion clinics, which the problem is that the allegations just aren’t true and we think that the state completely failed to prove or show that any abortions were happening or that any unlawful practice was happening at the clinics,” Marc Herron, interim associate director of litigation with the CRR, who is representing Rojas in the civil case, told ABC News.
ABC News has also reached out to the attorney representing Rojas in the criminal case.
Herron said the case against Rojas is significant because it marks the first time a provider has been criminally charged in Texas for violating the state’s abortion ban.
He accused Paxton’s office of conducting a “shoddy” investigation and said Rojas was using the abortion drug misoprostol to provide miscarriage care.
In January 2025, an anonymous complaint was filed with the Texas Health and Human Services Commission, alleging that two abortions were performed at one of Rojas’ clinics, according to the appellate brief.
The Medicaid Fraud Division within Paxton’s office began investigating, with one investigator claiming to find a pill bottle of the drug misoprostol, according to the complaint. While misoprostol can be used as part of a two-drug combination to induce an abortion, it is also used to treat first-trimester miscarriages.
In filing an appeal, Rojas’ attorneys argued that mifepristone, the drug given with misoprostol to induce an abortion, was never found by investigators, nor were tools found that would be used in a surgical abortion.
They also alleged the state investigators had no “medical training or expertise” to know what misoprostol could be used for and did not consult with a medical expert during the investigation.
Herron said the effects of the investigation and of the charges have been devastating on Rojas.
“I think this is a politically motivated case and the effect has been to completely upend my client’s life,” Herron said. “She was arrested twice. She was held in jail for 10 days and had to post this exorbitant $1.4 million bond. She’s now out, but she’s got to wear an ankle monitor. There are extreme restrictions on her travel. Her midwifery license has been temporarily suspended pending the outcome of the criminal proceedings, which could take years.”
He added that the proceedings have also affected the predominantly Spanish-speaking, low-income, uninsured patients who relied on care from Rojas and her clinics.
“People who relied on Mrs. Rojas for midwifery care — she delivered babies,” Herron said. “She was a caring, devoted midwife who delivered babies and provided care to her patients, and now her patients can’t turn to her. So this has been devastating.”
According to a press release last year from Paxton, Rojas is a midwife known as “Dr. Maria.” She allegedly owned and operated multiple clinics, including Clinica Waller Latinoamericana in Waller, Clinica Latinoamericana Telge in Cypress and Latinoamericana Medical Clinic in Spring — all in the northwest Houston area.
Rojas is accused of performing “illegal abortion procedures” in her clinics, which allegedly violated the Texas Human Life Protection Act, the attorney general’s office said.
Abortions are banned in Texas except in limited, exception cases if the woman has a life-threatening condition or is at risk of “substantial impairment of a major bodily function.”
In the limited exceptions when abortion is allowed, patients are required to make two trips, one for an in-person counseling session and then 24 hours later for the abortion, according to the Guttmacher Institute, a research group that focuses on sexual and reproductive health
Paxton’s office did not immediately return ABC News’ request for comment
Copyright © 2026, ABC Audio. All rights reserved.
(WASHINGTON) — Dr. Jay Bhattacharya, director of the National Institutes of Health (NIH), will take over as acting director of the Centers for Disease Control and Prevention, a White House official and sources familiar with the matter told ABC News.
Bhattacharya will continue in his current duties as NIH director until a permanent CDC director is nominated and confirmed, according to the White House official.
He replaces Jim O’Neill, who served as acting director of the CDC from late August 2025 until he stepped down last week.
O’Neill will be nominated as the next head of the National Science Foundation, according to the White House official.
Copyright © 2026, ABC Audio. All rights reserved.
(WASHINGTON) — The Trump administration walked back an Obama-era environmental decision that has been the legal basis for establishing federal regulation of greenhouse gas emissions.
The Environmental Protection Agency (EPA) said on Thursday it was rescinding the 2009 endangerment finding, which determined that six key greenhouse gases threaten human health and welfare.
The regulations that resulted cover everything from vehicle tailpipe emissions to the release of greenhouse gases from power plants and other significant emission sources.
President Donald Trump called the move “the single largest deregulatory action in American history” and said the repealed finding had “no basis in fact” and “no basis in law.”
The endangerment finding stemmed from the 2007 Supreme Court decision Massachusetts v. EPA, which held that the EPA could regulate greenhouse gases from motor vehicles under the 1970 Clean Air Act because those gases are air pollutants.
Some environmental scientists disagree, telling ABC News that the rescission is concerning and could have major implications for health. They add that decades of research has shown the impact climate change has on human health.
“The evidence is so overwhelming,” Dr. Ana Navas-Acien, chair of the department of environmental health sciences at Mailman School of Public Health at Columbia University, told ABC News.
“The scientific evidence showing the connection between greenhouse emissions, climate change and then the related health effects — it’s massive, it’s substantial, it has been reviewed by independent organizations,” she said. “So, the fact that this body of evidence has become so well established, it just speaks to the level of rigorous science that has been done.”
How greenhouse gases, climate change impact health
Research has shown that greenhouse gases — such as carbon dioxide and nitrous oxide — drive climate change, and, in turn, can harm human health by exposing people to events including wildfire smoke, extreme heat, flooding and waterborne diseases.
For example, rising temperatures have direct harms on health by increasing risk of dehydration and causing more stress on the heart.
During heat waves, the risk of death from heart attack increases by 64%, according to a 2024 study from researchers at Yale School of the Environment.
Additionally, a 2025 study from Yale School of Public Health found that between 2000 and 2020, there were more than 3,400 preventable deaths in the contiguous U.S. due to high temperatures.
The World Health Organization has warned there will be an estimated 250,000 additional deaths around the world annually from 2030 to 2050 due to climate change-related heat exposure.
“We have recent studies showing heat exposure can lead to heart attack events … and it goes beyond just the cardiovascular system,” Kai Chen, an associate professor of epidemiology at Yale School of Public Health and faculty director of the Yale Center on Climate Change and Health, told ABC News. “It goes beyond these kinds of physical conditions or physical health, [also] impacting our mental health.”
High temperatures can also negatively impact the quality and quantity of sleep, which can raise levels of cortisol in the body.
Studies have also shown that extreme heat can exacerbate conditions such as depression, anxiety and suicide ideation. For the latter, a 2023 meta-analysis found that even a slight bump in the average monthly temperature can lead to increases in suicide and suicidal behavior.
“So, really, heat can lead to a broad spectrum of diseases,” Chen added.
In recent decades, wildfires in the western U.S. have become larger, more intense, and more destructive due to a combination of factors, including human-amplified climate change and rapid urbanization, according to the federal government’s Fifth National Climate Assessment.
The same report found that these fires are worsening air quality in many part of the country due to wildfire smoke, which is a mixture of gases, water vapor, air pollutants and fine particulate matter. The latter, known as PM2.5, is at least 30 times smaller in diameter than a human hair.
Experts say these particles are of concern because they are too small to be seen with the naked eye and can easily enter the nose and throat. They can travel to the lungs and even circulate in the bloodstream.
PM2.5 can cause both short-term health effects, even for healthy people, including irritation of the eyes, nose and throat; coughing, sneezing; and shortness of breath and long-term effects such as worsening of conditions such as asthma, heart disease or chronic obstructive pulmonary disease flare-ups.
“Recent evidence has shown that the fine particulate matter in the air can also impact dementia and cognitive function,” Chen said. “It can also affect birth outcomes, leading to pre-term birth and low birth weight. So, air pollution is a major risk factor.”
Regulating fossil fuel combustion reduced PM2.5-related deaths by approximately 54% from 1990 to 2010, according to 2018 joint study from researchers in the U.S. and China.
Short- and long-term implications
Navas-Acien believes that, in the short-term, the rescinding of the endangerment finding will lead to higher pollution levels.
“Higher pollution levels, if we allow that to happen, that means more pollutants in the air that we breathe, in the water that we drink, in the food that we eat,” she said. “And that’s going to result in a higher burden of chronic diseases and even not just chronic disease, but also like heart attacks.”
Research has shown that in the days following an increased level of air pollutants, there are more visits to emergency rooms and hospital admissions for cardiorespiratory events, according to Navas-Acien.
“So that tells you that the impacts of pollution, in the short term, are very rapid,” she added.
In the absence of federal protections, Navas-Acien and Chen said state and local leaders can take actions to reduce greenhouse gas emissions and improve air quality.
On the individual level, to protect yourself, the experts recommend frequently checking the air quality in your area, wearing a mask if air pollution levels are high and supporting the creation of urban green spaces to combat climate change.
Chen said the EPA rescinding the endangerment finding is “very concerning” because “the scientific evidence has not become weaker, but actually became much stronger, showing the health harms from the climate change stirring from the greenhouse gas emissions. This rollback of policy will actually be threatening millions of Americans’ lives.”
“Climate change is impacting our health right now,” Chen continued. “It’s not a political debate. It is science and the science is clear. We need to take action.”
Copyright © 2026, ABC Audio. All rights reserved.