Deadly hantavirus outbreak suspected aboard a cruise ship

(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) — Nearly half of Americans — 152.3 million people — now live in places with unhealthy levels of ozone or particle pollution (PM2.5), two of the most dangerous air pollutants.

The American Lung Association’s 2026 “State of the Air” report finds that more than 129 million people live in counties with failing grades for ozone pollution. This type of pollution forms when sunlight interacts with compounds emitted from cars, industry and chemicals, creating harmful ground-level ozone in the air.

About 62 million people live in counties with failing grades for daily particle pollution spikes, which consist of tiny particles in the air produced by sources like car exhaust, power plants, construction, fires and dust, according to the report.

Exposure to dirty air was not equal, the report found.

People of color were more than twice as likely to live in areas failing all major pollution measures, according to the report.

“[In] areas where people have fewer socioeconomic resources … there’s a snowball effect because many of these areas may have less access to healthy food, less safe places to work out outside and less access to health care,” Dr. Afif El-Hasan, a board-certified pulmonologist and an American Lung Association spokesperson, told ABC News.

Many of these areas with high pollution are also underserved areas or have lower socioeconomic means, El-Hasan said.

Breathing in contaminated air not only makes people sicker; it affects family dynamics, finances and just about every other aspect of life, the report’s authors say.

Children are disproportionately affected as well. About 33.5 million of them are living in counties that received failing grades for at least one major air pollutant.

“Children who grow up in areas with polluted air are going to have decreased lung development compared to children who grow up having been exposed to clean air,” El-Hasan said. “Ultimately that leads to adults who have lower lung capacity than they would otherwise have — and that’s not reversible.”

And because the pollution compromises the body’s defenses, infections like the cold, flu and even COVID may be more severe in people who live in high-pollution areas, the findings suggested.

Despite decades of progress under the Clean Air Act, which was signed into law in 1970, the report found that air pollution is intensifying in many parts of the country.

Ozone pollution has worsened and now affects more people than in the past.

Climate change helps drive this trend by fueling extreme heat, drought and wildfires, the study suggested. And, while particle pollution has shown slight improvements, it still exposes far more people than historic low levels seen in the mid-2010s.

If you live in a place with poor air quality, there are steps you can take to protect your health, according to the American Lung Association.

Limit time outdoors on poor air quality days and check daily conditions. Use a high-quality mask like an N95 respirator and keep indoor air clean with filtration when pollution levels are high. Exercise indoors on bad air quality days.

Studies have also shown that staying up to date on vaccines, including flu and COVID shots, can also offer some protection.

Additionally, it’s critical the U.S. maintains the gains it has made on air quality over decades of stronger public health policies, El-Hasan said.

“Air does not respect borders — it will go everywhere,” El-Hasan said. “People should understand that what they do in terms of making sure policies are protecting air locally — it doesn’t just help you. If we are all helping keep our local air clean, it will help the rest of the nation as well.”

Grace Hagan M.D., is an internal medicine resident at Mayo Clinic and a member of the ABC News Medical Unit.

Copyright © 2026, ABC Audio. All rights reserved.

(NEW YORK) — A rare rodent-borne disease may be behind an outbreak aboard a cruise ship.

The World Health Organization (WHO) says there has been one laboratory confirmed case and five suspected cases. Of those six people, three have died.

The deaths occurred between April 11 and May 2 and the variant of hantavirus identified in at least one patient who is currently in intensive care, according to the WHO.

The WHO ⁠said on Monday that investigations into the deaths and illnesses are ongoing, including further laboratory testing.

The outbreak was reported on the MV Hondius, run by Oceanwide Expeditions, which was traveling between Argentina and the Canary Islands via Cape Verde.

Currently, the ship is off the coast of Cape Verde with 149 people on board representing 23 different nationalities, Oceanwide Expeditions said in a press release on Monday.

Here’s what you need to know about the outbreak, what hantavirus is and how it spreads.

Timeline of the outbreak

South African health officials said in a statement on Monday that the first two deaths occurred in a married couple from the Netherlands. The 70-year-old male passenger became ill first with a fever, headache, abdominal pain and diarrhea. He passed away upon arriving in St. Helena, a British territory in the South Atlantic Ocean, according to the statement.

The deceased passenger’s wife, 69, collapsed at Johannesburg O.R. Tambo International Airport while trying to connect to fly home to the Netherlands, according the country’s department of health. She was taken to a medical facility in nearby Kempton Park, where she also passed away, the statement said.

Another patient, a British national, fell ill while the ship was traveling from St. Helena to Ascension, also a British territory, according to the statement.

“Despite medical treatment provided to him at Ascension, his condition did not improve and necessitated his medical evacuation to a South African private health facility in Sandton for further medical management,” the statement said.

The patient is currently in critical condition in isolation but receiving medical attention, according to health officials, who said his laboratory test results came back positive for hantavirus.

Oceanwide Expeditions said in Monday’s press release that the first death occurred on April 11 and that the company learned of the second death on April 27. The British national also fell in on April 27.

A third passenger of German nationality died on May 2 from causes not yet known, according to Oceanwide Expeditions.

Meanwhile, two crew members – one of British nationality and one of Dutch nationality – are on board the MV Hondius with acute respiratory symptoms. One has a mild illness and one has severe symptoms, with both requiring urgent medical care, Oceanwide Expeditions said, adding that no other people with symptoms have been identified.

The company said that hantavirus has not been confirmed in the two patients still on board the ship, nor has it been confirmed as the cause of the three passenger deaths.

“Strict precautionary measures are in process on board, including isolation measures, hygiene protocols and medical monitoring. All passengers have been informed and are being supported,” the company said. “We understand the considerable interest and concern and will share new information as soon as it has been verified.”

WHO Director-General Dr. Tedros Ghebreysus said in a post on X on Sunday that the organization is working closely with both member states and ship operators in response to the suspected hantavirus cases.

“WHO is facilitating medical evacuation of two symptomatic passengers, conducting a full risk assessment, and supporting affected people onboard,” Ghebreysus wrote.

What is hantavirus?

Hantaviruses are a family of viruses that can cause serious illnesses and death, according to the Centers for Disease Control and Prevention (CDC).

The viruses cause two syndromes: hantavirus pulmonary syndrome (HPS) and hemorrhagic fever with renal syndrome (HFRS). HPS is mostly found in the Western Hemisphere, including the U.S., and HFRS is mostly found in Europe and Asia.

Surveillance for hantavirus in the U.S. began in 1993 during an outbreak in the Four Corners region, where Arizona, Colorado, New Mexico and Utah meet, the CDC said. Between 1993 and the end of 2023, 890 cases of hantavirus disease have been reported in the U.S., according to the CDC.

Hantavirus became more widely known after being identified as the cause of death of the wife of actor Gene Hackman after the couple was found dead at their New Mexico home in February 2025.

How does hantavirus spread?

Hantaviruses are usually spread through rodents, including rats and mice, mostly from exposure to urine, droppings or saliva. Although the viruses can spread through a rodent bite or scratch, such infection is rare, the CDC says.

Hantaviruses may also spread from person to person but that also is rare and only suspected for one subtype from South America, according to the WHO.

What are the hantavirus symptoms?

HPS symptoms typically appear from one to eight weeks after contact with the virus, with early signs including fever, fatigue and muscle aches, according to the CDC. Half of HPS patients will experience headaches, chills, dizziness, nausea, vomiting, diarrhea and abdominal pain.

The CDC says that between four and 10 days after the initial phase of illness, the late symptoms will appear, including coughing, shortness of breath and tightness in the chest as the lungs fill with fluid.

About 38% of people who develop HPS respiratory symptoms may die from the disease, according to the CDC.

Symptoms of HFRS usually develop one to two weeks after exposure and typically include intense headaches, fever, chills, back pain, abdominal pain, nausea and vomiting, the CDC says.

Later symptoms may include low blood pressure, lack of blood flow, internal bleeding and acute kidney failure. Depending on the virus causing the infection, fatality among infected humans can range from less than 1% to as high as 15%, the CDC says.

What hantavirus treatments are available?

No specific treatment is available for hantavirus infection, with the CDC recommending patients receive supportive care such as rest, hydration and treatment of symptoms.

Because HPS can cause breathing difficulties, patients may need breathing support, such as intubation, the CDC says.

Because HFRS can disrupt kidney function, infected patients may need dialysis to remove toxins from the blood, according to the CDC.

Copyright © 2026, ABC Audio. All rights reserved.