Health
The everyday places Americans could be exposed to hantavirus — without knowing it
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Amid the current hantavirus outbreak that started on the MV Hondius cruise ship as it sailed across the Atlantic, health experts are now examining whether Americans may be encountering the virus in everyday places without realizing it.
The rare Andes strain, which was linked to the MV Hondius outbreak, is the only known hantavirus that has the capability to spread from person to person, usually through prolonged close contact with an infected person.
Most cases of hantavirus in the U.S. occur in the desert Southwest and on the West Coast, according to Dr. Linda Yancey, an infectious disease specialist at Memorial Hermann in the Houston area.
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“In Texas, cases are mostly seen on the west side of the state,” she told Fox News Digital. “The strain of hantavirus native to east Texas and west Louisiana, the Bayou strain, is not as infectious in humans as the western strain, the Sin Nombre strain.”
Hantavirus is primarily spread through contact with infected rodents – primarily deer mice – and their urine, droppings or saliva. (iStock)
Hantavirus is mainly spread through contact with infected rodents – primarily deer mice – and their urine, droppings or saliva, according to the Centers for Disease Control and Prevention.
People can become infected after breathing in contaminated particles that are stirred into the air or touching contaminated surfaces and then touching their nose or mouth. More rarely, rodent bites can spread the virus.
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Exposure is most likely when cleaning enclosed or poorly ventilated areas where rodents may nest unnoticed for weeks or months, health officials say.
Risky locations can include garages, sheds, cabins, attics, barns and crawl spaces. Storage units, stables, kitchen cabinets and spaces behind appliances if rodents are present.
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Rodents can also nest in unused cars, RVs, campers and boats, which can be sources of exposure when reopened.
The National Park Service says that most human cases of hantavirus occur in the spring and are linked to buildings that become heavily infested with rodents over the winter.
The risk of inhalation is also higher when opening buildings that have gone unused for longer periods of time, sweeping dusty floors, or moving and unpacking boxes. (iStock)
“Most people are exposed when cleaning out sheds and garages where rodents have been living,” Yancey confirmed. “You can be exposed by just the dust and droppings left behind by rodents – you don’t even need to even see the rodent to be exposed.”
The risk of inhalation is also higher when opening buildings that have gone unused for longer periods of time, sweeping dusty floors or moving and unpacking boxes, experts cautioned.
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Rodent exposure is not limited to buildings. Health officials say people can also encounter hantavirus risk while handling firewood, working in rodent-prone outdoor areas or disturbing rodent nests and burrows.
To prevent infection, if cleaning a structure that might have harbored rodents, Yancey recommends wearing a mask and using a diluted bleach solution to wet down any dust or loose debris.
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“This will help kill the exposed virus and reduce the amount of infectious dust,” Yancey said.
The CDC advises against vacuuming or sweeping rodent urine, droppings or nesting materials, as this can aerosolize the virus and increase the risk of inhalation.
A Spanish passenger boards a government plane after disembarking from the hantavirus-stricken cruise ship MV Hondius at the airport in Tenerife, Canary Islands, on May 10, 2026. (Arturo Rodriguez/AP Photo)
Instead, health officials recommend wearing gloves, soaking rodent droppings with disinfectant, wiping them up with paper towels, properly disposing of waste and thoroughly cleaning surfaces, followed by careful handwashing.
Some signs of rodent activity can include droppings, shredded nesting materials, gnaw marks, strong musky odors and scratching sounds in the walls or ceilings, according to public health guidance.
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Dr. Marc Siegel, Fox News senior medical analyst, emphasized that hantavirus is not something that most Americans encounter in daily life, and is more prominent in certain parts of Europe and Asia.
“It is very rare in the U.S. and is seen out west, but rarely,” he told Fox News Digital. “We need to avoid overpersonalizing the risk of a very rare virus.”
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Potentially deadly sepsis may be more likely in certain patients due to problems in the gut.
Researchers from the Korea Research Institute of Bioscience and Biotechnology’s Infectious Disease Research Center used female mouse models to investigate why sepsis outcomes can vary so dramatically.
The study, published in the journal Nature, looked at genetically similar mice with different gut microbiomes. The mice were infected with Acinetobacter baumannii — a highly resilient bacterium that can lead to sepsis.
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The researchers compared groups of mice with higher and lower survival rates, examining differences in their gut microbiomes, the amount of bacteria in their blood and organs, and other cellular markers, according to the study press release.
Gut health could signal severe sepsis prior to infection, the study suggests. (iStock)
Measures of risk
Although some mice were genetically similar, the more vulnerable mice had a higher concentration of Muribaculaceae bacteria in the gut. In one comparison, these bacteria made up about 28% of the microbiome in poor surviving mice, but only 0.15% in better surviving mice.
Mice with worse survival showed an early and strong inflammatory response, which later led to more bacteria in the blood, lungs and spleen. This suggests that the microbiome causes the immune system to be more reactive, according to the researchers.
GUT MICROBES COULD BE KEY TO FIGHTING TOXIC, LONG-LASTING ‘FOREVER CHEMICALS,’ RESEARCH SAYS
In the microbiome of mice with worse survival, the researchers also noticed that one strain of bacteria — Sangeribacter muris KT1-3 — was most prominent. The mice that typically survived at high rates fared much worse when housed with KTI-3 mice, with their survival falling to 10%.
More vulnerable mice had a higher concentration of Muribaculaceae bacteria in the gut. (iStock)
This bacterial strain also appeared to worsen inflammation during certain infections, making sepsis more severe.
These findings suggest that the gut microbiome can signal how the immune system will react before an infection begins.
The microbiome’s surprising influence
Andrew Fleming, MD, section chief of Infectious Diseases & Immunology at NYU Langone Hospital, Brooklyn, said it has been “known for years” that gut bacteria and bacterial toxins can be released into the bloodstream during sepsis.
This worsens the inflammatory response to the initial infection, according to Fleming, who was not involved in the study.
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“This process is particularly important in septic shock, where the intestinal wall becomes more permeable to translocation (or leaking) of bacterial products,” Fleming said.
Interactions between the gut microbiome and the immune system are “complex and variable from person to person,” the doctor described.
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“But there is mounting evidence that a diverse and healthy gut microbiome – the community of bacteria that lives in a person’s gut – is protective in some ways against severe sepsis,” he went on. “And a dysregulated microbiome – for example, one severely altered by antibiotics – can impair or worsen the immune system’s response during sepsis.”
Interactions between the gut microbiome and the immune system are “complex and variable from person to person,” a doctor described. (iStock)
Scientists are starting to think of the gut microbiome “almost as a living organ,” according to Fleming, much like the heart, kidneys or liver, all serving “multiple functions” to keep the body healthy.
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An unhealthy microbiome can have “detrimental effects across a range of health issues,” he added – including how the body responds to infections.
“Compared to our other organs, we currently have fewer readily available tests in the doctor’s office to measure the health of our microbiome,” Fleming said. “However, this should not prevent us from thinking about our gut microbiome and how to keep it healthy.”
The role of antibiotics
The use of antibiotics has “major and long-lasting effects” on the microbiome, Fleming noted. Up to 80% of adults in the U.S. are prescribed an antibiotic every year, while 30% are estimated to be unnecessary, according to the CDC.
“Antibiotics deplete the diversity of the microbiome and create a void in the gut microbial community that can be filled by harmful bacteria from the environment,” the doctor told Fox News Digital.
Antibiotics “deplete the diversity of the microbiome and create a void in the gut microbial community that can be filled by harmful bacteria from the environment,” the doctor said. (iStock)
“We must begin to think much more critically about our antibiotic use and overuse, both to maintain our gut health and to reduce the spread of antibiotic resistance.”
The study findings are an “intriguing starting point to further research,” Fleming said, although there were some key limitations.
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“Sangeribacter muris is not typically found in humans, so the exact mechanism of this bacterial strain worsening sepsis that is demonstrated in this study cannot be directly extrapolated to people,” he said. “Well-designed clinical trials should be conducted to explore how similar gut microbiome effects may play out in sepsis in humans.”
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Despite these limitations, the doctor said he supports the hypothesis that maintaining a healthy gut microbiome can help keep the immune system well-regulated while reducing the risk of developing severe sepsis.
NEWYou can now listen to Fox News articles!
Potentially deadly sepsis may be more likely in certain patients due to problems in the gut.
Researchers from the Korea Research Institute of Bioscience and Biotechnology’s Infectious Disease Research Center used female mouse models to investigate why sepsis outcomes can vary so dramatically.
The study, published in the journal Nature, looked at genetically similar mice with different gut microbiomes. The mice were infected with Acinetobacter baumannii — a highly resilient bacterium that can lead to sepsis.
ER DOCTOR REVEALS HOW PNEUMONIA CAN SUDDENLY TURN DEADLY AFTER KYLE BUSCH’S DEATH
The researchers compared groups of mice with higher and lower survival rates, examining differences in their gut microbiomes, the amount of bacteria in their blood and organs, and other cellular markers, according to the study press release.
Gut health could signal severe sepsis prior to infection, the study suggests. (iStock)
Measures of risk
Although some mice were genetically similar, the more vulnerable mice had a higher concentration of Muribaculaceae bacteria in the gut. In one comparison, these bacteria made up about 28% of the microbiome in poor surviving mice, but only 0.15% in better surviving mice.
Mice with worse survival showed an early and strong inflammatory response, which later led to more bacteria in the blood, lungs and spleen. This suggests that the microbiome causes the immune system to be more reactive, according to the researchers.
GUT MICROBES COULD BE KEY TO FIGHTING TOXIC, LONG-LASTING ‘FOREVER CHEMICALS,’ RESEARCH SAYS
In the microbiome of mice with worse survival, the researchers also noticed that one strain of bacteria — Sangeribacter muris KT1-3 — was most prominent. The mice that typically survived at high rates fared much worse when housed with KTI-3 mice, with their survival falling to 10%.
More vulnerable mice had a higher concentration of Muribaculaceae bacteria in the gut. (iStock)
This bacterial strain also appeared to worsen inflammation during certain infections, making sepsis more severe.
These findings suggest that the gut microbiome can signal how the immune system will react before an infection begins.
The microbiome’s surprising influence
Andrew Fleming, MD, section chief of Infectious Diseases & Immunology at NYU Langone Hospital, Brooklyn, said it has been “known for years” that gut bacteria and bacterial toxins can be released into the bloodstream during sepsis.
This worsens the inflammatory response to the initial infection, according to Fleming, who was not involved in the study.
5 GUT-BOOSTING FRUITS TO EAT MORE OF IN 2026 FOR BETTER DIGESTION, EXPERTS SAY
“This process is particularly important in septic shock, where the intestinal wall becomes more permeable to translocation (or leaking) of bacterial products,” Fleming said.
Interactions between the gut microbiome and the immune system are “complex and variable from person to person,” the doctor described.
CLICK HERE TO DOWNLOAD THE FOX NEWS APP
“But there is mounting evidence that a diverse and healthy gut microbiome – the community of bacteria that lives in a person’s gut – is protective in some ways against severe sepsis,” he went on. “And a dysregulated microbiome – for example, one severely altered by antibiotics – can impair or worsen the immune system’s response during sepsis.”
Interactions between the gut microbiome and the immune system are “complex and variable from person to person,” a doctor described. (iStock)
Scientists are starting to think of the gut microbiome “almost as a living organ,” according to Fleming, much like the heart, kidneys or liver, all serving “multiple functions” to keep the body healthy.
CLICK HERE FOR MORE HEALTH STORIES
An unhealthy microbiome can have “detrimental effects across a range of health issues,” he added – including how the body responds to infections.
“Compared to our other organs, we currently have fewer readily available tests in the doctor’s office to measure the health of our microbiome,” Fleming said. “However, this should not prevent us from thinking about our gut microbiome and how to keep it healthy.”
The role of antibiotics
The use of antibiotics has “major and long-lasting effects” on the microbiome, Fleming noted. Up to 80% of adults in the U.S. are prescribed an antibiotic every year, while 30% are estimated to be unnecessary, according to the CDC.
“Antibiotics deplete the diversity of the microbiome and create a void in the gut microbial community that can be filled by harmful bacteria from the environment,” the doctor told Fox News Digital.
Antibiotics “deplete the diversity of the microbiome and create a void in the gut microbial community that can be filled by harmful bacteria from the environment,” the doctor said. (iStock)
“We must begin to think much more critically about our antibiotic use and overuse, both to maintain our gut health and to reduce the spread of antibiotic resistance.”
The study findings are an “intriguing starting point to further research,” Fleming said, although there were some key limitations.
CLICK HERE TO SIGN UP FOR OUR HEALTH NEWSLETTER
“Sangeribacter muris is not typically found in humans, so the exact mechanism of this bacterial strain worsening sepsis that is demonstrated in this study cannot be directly extrapolated to people,” he said. “Well-designed clinical trials should be conducted to explore how similar gut microbiome effects may play out in sepsis in humans.”
TEST YOURSELF WITH OUR LATEST LIFESTYLE QUIZ
Despite these limitations, the doctor said he supports the hypothesis that maintaining a healthy gut microbiome can help keep the immune system well-regulated while reducing the risk of developing severe sepsis.
NEWYou can now listen to Fox News articles!
The old saying that laughter is the best medicine may be true, according to new research that suggests it is also a vital catalyst for children’s development.
Laughter and play are fundamental to healthy brain growth, emotional well-being and social bonding, according to Jacqueline Harding, Ph.D., an early childhood expert at Middlesex University in London.
In her book, “The Brain That Loves to Laugh,” Harding argues that joy is a complex biological phenomenon that helps children navigate stress and build more resilient, receptive minds, news agency SWNS reported.
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“When we see children laugh, we witness the brilliance of the brain in action: learning, connecting and growing,” Harding told SWNS.
“Hope and humor, it seems, are not just the seasoning of life, but foundational to a recipe for healthy development.”
Laughter alters internal chemistry by decreasing stress hormones and boosting feel-good chemicals like serotonin, experts say. (iStock)
Laughter activates broad brain networks, including motor regions and the prefrontal cortex, long before children learn to speak. By helping the brain resolve conflicting ideas, it boosts creativity and engages working memory, acting as a “mental workout,” experts say.
At a molecular level, laughter alters the internal chemistry by decreasing stress hormones like cortisol and epinephrine. It also increases “happiness chemicals” like dopamine, serotonin and endorphins.
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Additionally, laughter is known to boost oxytocin, which deepens emotional bonds between parents and children.
Prolonged stress does the exact opposite: It impairs learning, suppresses immune function and alters the developing limbic system, which governs emotion and long-term memory, according to SWNS.
Prolonged stress can negatively impact not only children’s mental well-being, but their physical state as well. (iStock)
“Stated simply, the emotional state of young children directly influences how they navigate their way through the world,” Harding said.
Parents can foster these benefits through moments of spontaneous play and joyful connection, the expert advised.
“Spontaneous, joyful play is an antidote to stress.”
These interactions do more than spark laughter — they help children develop emotional regulation, strengthen feelings of safety and connection, and support social and cognitive development, according to the American Academy of Pediatrics.
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“Spontaneous, joyful play is an antidote to stress, as it increases levels of endorphins released by the brain,” Harding said. “Creative, happy play does its most brilliant work at a molecular level, especially at a time when the human brain is at its most receptive.”
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This shared joy also establishes “co-regulation,” where a child learns to manage their own stress by drawing on a biological store of positive early experiences.
Spontaneous, joyful play is an antidote to stress, as it increases levels of endorphins released by the brain, the expert said. (iStock)
Harding advocates for integrating humor directly into classrooms to reduce cognitive load and improve how children retain key concepts.
By uplifting the nervous system, joy creates an optimal environment for information absorption, as the SWNS piece noted.
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“Safe relationships and non-stressful play environments promote learning,” she added.
“The curriculum must never be prioritized over those two fundamental factors.”
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