Microplastics in Our Brains Rapidly Rising

Addiction Recovery Bulletin

CROSSING THE BLOOD BRAIN BARRIER –

Feb. 3, 2025 – It found a rising trend in micro-and nanoplastics in brain tissue from dozens of postmortems carried out between 1997 and 2024. The researchers also found the tiny particles in liver and kidney samples.

The human body is widely contaminated by microplastics.  They have also been found in blood, semen, breast milk, placentas and bone marrow. The impact on human health is largely unknown, but they have been linked to strokes and heart attacks.

The scientists also found that the concentration of microplastics was about six times higher in brain samples from people who had dementia. However, the damage dementia causes in the brain would be expected to increase concentrations, the researchers said, meaning no causal link should be assumed.

“Given the exponentially rising environmental presence of micro- and nanoplastics, this data compels a much larger effort to understand whether they have a role in neurological disorders or other human health effects,” said the researchers, who were led by Prof Matthew Campen at the University of New Mexico in the US.

CONTINUE@TheGuardian

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Sam Cooke – A Change Is Gonna Come 1963 

Addiction Recovery Bulletin

VIDEO – MUSICAL INTERLUDE – 

84,794,972 views Since Jan 22, 2016 – 

I was born by the river in a little tent

Oh, and just like the river I’ve been a-runnin’ ever since.

It’s been a long, a long time comin’,

but I know, oh-oo-oh,

a change gon’ come, oh yes, it will. 

CONTINUE@YouTube

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Pumpkin Spice Lattes Harm Teenagers

Addiction Recovery Bulletin

SPEED THE WOW – 

Jan. 28, 2025 – A venti-size pumpkin spice latte from Starbucks contains 150mg in the United States, exceeding the 100mg limit recommended for young people aged 12-18. 

Previous Government reports have linked excessive caffeine consumption in children to negative health outcomes.

Expressing concern about the suitability of this autumnal drink for teenagers, Dr Masarat says: “While we’ve rightly seen a lot of political interest in the risk that energy drinks with high caffeine content can pose to children and teens, less has been said about fashionable coffee drinks such as this season’s popular pumpkin spice latte.”

He added: “Excessive caffeine intake for young teens can lead to an increased heart rate, known as tachycardia, which can be dangerous, especially for teens with underlying heart conditions.”

CONTINUE@ExpressUS

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The War For Your Attention

Addiction Recovery Bulletin

AUDIO – HOW MANY SCREENS? – 

Feb. 1, 2025 – A friend of mine once told me that “You are where your attention is.” That line always stuck with me. It was a reminder that the most important choice we all make is also the most common one. It’s the decision about what to pay attention to and what not to pay attention to.

One of the primary features of this age of the internet and smartphones and algorithmic feeds is that our attention is everywhere and nowhere at the same time, because we’re endlessly pushed around by a parade of distractions. Your phone is ringing, your Apple Watch is blinking, you got a ping on Slack from a coworker, you’re getting an email notification as you’re sitting down for dinner… it’s always something.

This level of distraction is not an accident. Our devices have engineered the incessant need for stimulus and a whole industry has emerged that’s devoted to capturing our attention and then selling it to the highest bidder.

CONTINUE@Vox

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Colombian President Gustavo Petro: Cocaine ‘no worse than whisky’

Addiction Recovery Bulletin

NO BETTER –

Feb. 6, 2024 – Colombia is the world’s biggest cocaine producer and exporter, mainly to the United States and Europe, and has spent decades fighting against drug trafficking. “If you want peace, you have to dismantle the business (of drug trafficking),” he said. “It could easily be dismantled if they legalize cocaine in the world. It would be sold like wine.”

Petro also pointed out that fentanyl “is killing Americans and it is not made in Colombia”, referring to the opioid responsible for around 75,000 deaths in the United States a year, according to official data.

“Fentanyl was created as a pharmacy drug by North American multinationals” and those who consumed it “became addicted,” he added.

Since coming to power in 2022, Petro has attempted to make peace with all of the armed groups that are fueled by drug trafficking in the hope of ending six decades of conflict.

CONTINUE@YahooNews

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Processed Foods Major Health Risk to Kids 

Addiction Recovery Bulletin

VIDEO – HARD TO SWALLOW –

Feb. 3, 2025 – Childhood obesity has tripled since the 1970s, with one in five children overweight or obese! 

Experts attribute this trend to the prevalence of ultra-processed foods in children’s diets, which are high in calories but low in nutrition. “What we put into our bodies is the most important determinants of our health. Garbage in, garbage out.” They say that processed foods, often engineered to be palatable and addictive, contribute significantly to health issues such as diabetes and hypertension in children. These foods are typically high in added sugars, salts, artificial colors, and preservatives. Martinez noted that the lack of essential vitamins and minerals in these diets affects children’s immune systems, while Apodaca highlighted the impact on brain function and energy levels.

CONTINUNE@MSN

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Addict Gets Prison for OD Deaths of Two Sisters

Addiction Recovery Bulletin

HELL ON EARTH – 

Feb. 4, 2025 – Prosecutors called Anthony Del Valle an “enemy of the public,” a man so greedy that he preyed on and poisoned two disabled, drug-addicted women who considered him a friend. His lawyer called him an “absolute hero” who, like the dead women, had gotten hooked on painkillers after a freak accident and lost his grip on a law-abiding life. For his part, Del Valle looked only frightened.

Prosecutors recommended that he be sentenced to 20 years in prison Thursday for selling counterfeit painkillers to sisters Jennifer Graham, 50, and Julie Beckstrom, 57, hours before they fatally overdosed on April 7. Armed with advisory sentencing guidelines that recommended less than half that time, defense attorney Glenn Mitchell asked for seven years and three months instead.

CONTINUE@PalmBeachPost

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Former NFL QB Ryan Leaf on Overcoming Addiction 

Addiction Recovery Bulletin

VIDEO – TEAM WORK –

Feb. 3, 2025 – Ryan Leaf is an NFL analyst with the Bleav audio and video network and host of Last Mile Radio on Sirius XM. He was originally the second overall pick in the 1998 NFL Draft by the San Diego Chargers.  

CONTINUE@YouTube

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A Year After Super Bowl Parade Shooting, Trauma Freeze Gives Way to Turmoil for Survivors

KFF Health News and KCUR followed the stories of people injured during the Feb. 14, 2024, mass shooting at the Kansas City Chiefs Super Bowl celebration. As the one-year mark since the parade shooting nears, the last installment in our series “The Injured” looks at how some survivors talk about resilience, while others are desperately trying to hang on.

Emily Tavis was on a first date in December when she looked up and realized they were driving past the downtown Kansas City, Missouri, intersection where a bullet ripped through her leg at last year’s Super Bowl victory parade.

“Oh f—,” Tavis said, bewildering her date.

She lives 35 miles away in Leavenworth, Kansas, and hadn’t yet returned to Union Station, where the mass shooting happened. She felt like crying. Or maybe it was a panic attack. She held up a finger signaling to her date that she needed a moment. That’s when it hit him, too.

“Oh crap, I didn’t even realize,” he said, and kept driving in silence.

Tavis sucked in her tears until the station was out of view.

“So anyway,” she said aloud, while thinking to herself, “way to go. Panic attack, first date.”

A year after the Feb. 14 shooting that killed one and injured at least 24 people, the survivors and their families are still reeling. Relationships have strained. Parents are anxious about their children. The generous financial support and well wishes that poured through in early days have now dried up. And they’re ambivalent about the team they all root for; as the Chiefs moved on to another Super Bowl, many wondered why their beloved team hasn’t acknowledged what they have all been going through.

“I can’t believe the Chiefs didn’t do anything for us,” said Jacob Gooch Sr., who was shot in the foot. The team, the owner family’s foundation, and the National Football League gave a combined $200,000 to a fund for survivors, but Gooch said no one from the organization reached out to his family, three members of whom were shot.

What’s happening to these families is far from unusual. Many survivors emotionally freeze as a coping mechanism to avoid fully feeling the trauma they suffered. But with time, survivors experience what therapists call “thawing,” and the intensity of what happened can suddenly overpower them like it did Tavis.

“Trauma pulls us into the past,” said Gary Behrman, a therapist who published a model of crisis intervention based on his work with witnesses of the 9/11 attacks in New York.

Sights, smells, sounds, tastes, and touches can all trigger flashbacks that shut down the brain like an overloaded circuit breaker. It’s a survival response, Behrman said; the brain is a friend.

The key to recovery is to help survivors find healthy ways to manage those triggers — when they are ready.

Survivors thaw at their own pace. Regaining control after a life-threatening event is a process that can take weeks, months, or years.

A man in a navy collared shirt poses for a portrait sitting on a wooden chair
Jacob Gooch Sr. hasn’t been back to work since he was shot in the foot at last year’s Kansas City Chiefs Super Bowl celebration. He had hoped to return in July but the shattered bone in his foot didn’t heal properly, requiring surgery in August.(Christopher Smith for KFF Health News)

It can be hard not to feel forgotten when life carries on around them. As fans rallied around the Chiefs this season, survivors found it hard to watch the games. The Chiefs lost to the Philadelphia Eagles in Sunday’s Super Bowl. Philadelphia will hold its own parade on Friday, exactly one year after the shooting.

“It sucks because everybody else went on,” Jason Barton said. He performed CPR on a man he now thinks was one of the alleged shooters, his wife found a bullet slug in her backpack, and his stepdaughter was burned by sparks from a ricocheted bullet.

“If we were on the other side of that place, we would too,” he said. “It wouldn’t have affected us.”

A Trip Back to Union Station

Tavis isn’t the only survivor to have found herself unintentionally back at Union Station in the year since the shooting. Kids had field trips to Science City, located inside the station. Follow-up doctor visits were often on nearby Hospital Hill. An October dinner organized for survivors by a local faith-based group was less than a mile away, prompting one young survivor to decline the invitation.

Tavis had planned to return to Union Station as part of her healing process. She thought she would go on the one-year mark to have a moment alone to feel whatever emotions swept over her there.

Maybe God was showing her she was ready by placing her back there unexpectedly, her therapist told her. Maybe. But she didn’t feel ready in that moment.

Tavis wanted to see a therapist right after the shooting. But she didn’t seek one out until July, after the local United Way distributed financial assistance to survivors and relieved the months-long financial strain of lost work and medical bills incurred by many. Tavis and her partner at the time had taken out an extra credit card to cover expenses while they waited for the promised help.

After two months of visits, her therapist started prepping Tavis for eye movement desensitization and reprocessing, a technique to help trauma survivors. She now spends every other session making her way through a spreadsheet of memories from the parade, visualizing and reprocessing them one by one.

A blonde-haired woman wearing glasses stands in the pews at a church service
Tavis attends Westside Family Church in Leavenworth, Kansas, on Feb. 2. The church has been a source of companionship and support since she was shot at last year’s Kansas City Chiefs Super Bowl celebration. She was even referred to the in-house therapist at a sister church in Lenexa, Kansas.(Christopher Smith for KFF Health News)
A woman points to a mental health app on her phone
Tavis demonstrates an app she uses to track her mood and feelings as she manages the trauma of being wounded by gunfire during last year’s Super Bowl celebration at Union Station. (Christopher Smith for KFF Health News)

A woman shows her manicured fingernails, painted in a Kansas City Chiefs theme
Tavis shows off her Kansas City Chiefs-themed fingernails in February. The yellow on both ring fingers was chipped so she got them redone before this year’s Super Bowl. (Christopher Smith for KFF Health News)

She’s nervous as the one-year mark approaches. It’s on Valentine’s Day, and she worries it’ll be depressing.

She decided to invite Gooch, her former partner, to come to Union Station with her that day. Despite everything, he’s the one who understands. They were at the parade together with their son and Jacob’s two older kids. Both Gooch Sr. and his older son, Jacob Gooch Jr., were also shot.

Trauma Changes Who We Are

Gooch Sr. hasn’t worked since the parade. His job required standing for 10-hour shifts four days a week, but he couldn’t walk for months after a bullet shattered a bone in his foot and it slowly fused back together. He hoped to go back to work in July. But his foot didn’t heal correctly and he had surgery in August, followed by weeks of recovery.

His short-term disability ran out, as did his health insurance through work. His employer held his job for a while before releasing him in August. He’s applied for other jobs in and around Leavenworth: production, staffing agencies, auto repair. Nothing’s come through.

“We’ve all gone through problems, not just me,” Gooch Sr. said. “I got shot in my foot and haven’t worked for a year. There are people that have been through much worse stuff over the past year.”

He feels good walking now and can run short distances without pain. But he doesn’t know if he’ll ever play football again, a mainstay of his life since he can remember. He played safety for the semiprofessional Kansas City Reapers and, before the parade, the 38-year-old was considering making the 2024 season his last as a player.

“A lot more than football has been stolen from me in this last year. Like my whole life has been stolen from me,” Gooch Sr. said. “I really hate that part of it.”

A man in a navy collared shirt poses for a photo holding a football helmet
“That was the ‘heartbroken I can’t play football anymore’ face,” Gooch Sr. jokes a year after he was shot in the foot at the Super Bowl celebration. He had been playing semiprofessional football before the event.(Christopher Smith for KFF Health News)

And those emotions are painfully real. Trauma threatens our beliefs about ourselves, said Behrman, the therapist. Every person brings their own history to a traumatic event, a different identity that risks being shattered. The healing work that comes later often involves letting go and building something new.

Recently Gooch Sr. started going to a new church, led by the husband of someone he sang with in a children’s choir growing up. At a Sunday service this month, the pastor spoke about finding a path when you’re lost.

“I’m looking for the path. I’m in the grass right now,” Gooch Sr. said at his home later that evening.

“I’m obviously on a path, but I don’t know where I’m headed.”

Three men stand in a pew during a church service
Gooch Sr. (center) prays with older son Jacob Gooch Jr. (right) during a service at Faith Walkers Outreach church in Leavenworth, Kansas, on Feb. 2.(Christopher Smith for KFF Health News)

‘I Did the Best I Could’

Every day before Jason Barton goes to work, he asks his wife, Bridget, if he should stay home with her.

She’s said yes enough that he’s out of paid time off. Jason, who’s survived cancer and a heart attack, had to take unpaid leave in January when a bad case of the flu put him in the hospital. That’s real love, Bridget said with tearful eyes, sitting with Jason and her 14-year-old daughter, Gabriella, in their home in Osawatomie, Kansas.

Bridget has connected with the mother of another girl injured in the shooting. They’ve exchanged texts and voicemails throughout the year. It’s nice to have someone to talk to who gets it, Bridget said. They’re hoping to get the girls together to build a connection as well.

Except for a trip to therapy once a week, Bridget doesn’t leave the house much anymore. It can feel like a prison, she said, but she’s too scared to leave. “It’s my own internal hell,” she said. She keeps thinking about that bullet slug that lodged in her backpack. What if she’d been standing differently? What if they’d left 10 seconds earlier? Would things be different?

A Post-it note in her kitchen reminds her: “I’m safe. Gabriella is safe. I did the best I could.”

A blue Post-it note with handwriting hangs from a wooden cabinet
A Post-it note hangs in Bridget Barton’s kitchen to remind her every day that her family is safe after experiencing the mass shooting at last year’s Kansas City Chiefs Super Bowl celebration. (Bram Sable-Smith/KFF Health News)

A woman in a pink plaid shirt looks out a window
Bridget Barton stares out the window in Osawatomie, Kansas, on Feb. 1. She hasn’t left the house much in the year since her family experienced the shooting. (Bram Sable-Smith/KFF Health News)

She carries a lot of guilt. About Jason staying home. About not leaving the house, even to see her grandkids. About wanting the family to go to the parade in the first place. At the same time, she knows she kind of thrived in the chaos after the shooting, taking charge of her daughter, talking to the police. It’s confusing.

The family has carried the trauma differently. In the six months after the parade, Jason watched reality TV shows that kept him out of his head — 23 seasons of “Deadliest Catch” and 21 seasons of “Gold Rush,” including spinoffs, he estimated. Lately he’s kept his mind occupied with a new hobby: building model cars and planes. He just finished a black 1968 Shelby Mustang, and next is an F4U-4 Corsair plane that Bridget got him.

Gabriella was unfazed about returning to Union Station for a class field trip to Science City, but she was startled when she saw a group of police officers inside the station. Her mom watched her location on her phone and texted her all day.

Gabriella took up boxing after the parade, then switched to wrestling. It had been going well, even felt empowering. But she’s stopped going, and Bridget thinks it’s partly due to the emotion of the anniversary — the first is always the hardest, her therapist said. Gabriella insisted that wrestling was just exhausting her.

Because they weren’t shot, the family didn’t benefit from resources available to other survivors. They understand that other families are recovering from bullet wounds or even mourning a death.

Still, it would be nice to have some acknowledgment of their emotional trauma. Their names have been in the news. You’d think the Chiefs would have at least sent a letter saying, “We’re sorry this happened to you,” Jason said.

Jason proposed to Bridget at a Chiefs game. Now watching games on TV triggers flashbacks.

“I want to be a part of Chiefs Kingdom again,” Bridget said, “but I just can’t. And that is a huge, really lonely feeling.”

A woman in a pink plaid shirt holds a coffee cup and sits on a couch next to a girl in a burgundy hoodie sweatshirt
Bridget Barton and daughter Gabriella Magers-Darger on their couch in Osawatomie, Kansas, on Feb. 1. Barton found a bullet slug in her backpack after the shooting and Gabriella’s legs were burned by sparks from a ricocheted bullet.(Bram Sable-Smith/KFF Health News)

‘There Is a Word Called “Resilience”’

One evening last October, survivors gathered with their families at a Mexican restaurant in downtown Kansas City.

Some came dressed in their Sunday best, some in red football jerseys. All ages, toddlers to 70-somethings, some from Missouri, some from Kansas. Some spoke only Spanish, some only English. Most of the two dozen people had never met before. But as they talked, they discovered the shooting that binds them also gave them a common language.

Two young boys realized they’d tossed a football during the jubilation before the violence erupted. A woman in her early 70s named Sarai Holguin remembered watching them play on that warm February day. After a blessing and dinner, Holguin, who was shot in the knee and has had four surgeries, stood to address the room.

“I was the first victim taken to the medical tent,” she said in Spanish, her words translated by a relative of another survivor. She saw everything, she explained, as, one by one, more survivors were brought to the tent for treatment, including Lisa Lopez-Galvan, a 43-year-old mother who was killed that day.

Yet in that tragedy, Holguin saw the beauty of people helping one another.

“This showed us that humanity is still alive, that love is still alive. There is a word called ‘resilience,’” Holguin said, the translator stumbling to understand the last word, as people in the audience caught it and shouted it out. “Resilience.”

“This word helps us overcome the problems we face,” Holguin said. “To try to put the tragic moment we all lived behind us and move on, we must remember the beautiful moments.”

A woman wearing a black and white striped shirt and pink glasses smiles standing in a yellow-tiled kitchen
Sarai Holguin in her Kansas City, Kansas, kitchen. Holguin was shot in the left knee at the Kansas City Chiefs Super Bowl parade on Feb. 14, 2024, and has had four surgeries. Despite the tragedy, Holguin says she sees the beauty in people helping one another in its aftermath.(Peggy Lowe/KCUR 89.3)

This article was produced by KFF Health News, a national newsroom that produces in-depth journalism about health issues and is one of the core operating programs at KFF — the independent source for health policy research, polling, and journalism. 

House Cats With Bird Flu Could Pose a Risk to Public Health

More than 80 domestic cats, among many other types of mammals, have been confirmed to have had bird flu since 2022 — generally barn cats that lived on dairy farms, as well as feral cats and pets that spend time outdoors and likely caught it by hunting diseased rodents or wild birds.

Now, a small but growing number of house cats have gotten sick from H5N1, the bird flu strain driving the current U.S. outbreak, after eating raw food or drinking unpasteurized milk. Some of those cats died.

The strain of bird flu currently circulating has not adapted to efficiently spread among people. And there have been no known cases of cat-to-human transmission during the current outbreak of H5N1.

Still, there’s always been the risk that cats, which are arguably only semi-domesticated, could bring home a disease from a midnight prowl.

“Companion animals, and especially cats, are 100% a public health risk in terms of the risk of zoonotic transmission to people,” said virologist Angela Rasmussen, who studies disease progression in emerging viruses at the University of Saskatchewan’s Vaccine and Infectious Disease Organization.

This is because we snuggle with and sleep in bed with our cats. When we’re not looking, cats drink from our water glasses and walk on kitchen counters. So, cat owners should be aware of the ongoing spread of bird flu. “By reducing the risk to your cats, you reduce the risk to yourself,” Rasmussen said.

Rasmussen doesn’t think pet owners should be afraid their cats will give them bird flu but said taking precautions is good for pets, and for public health.

Signs of bird flu in cats include runny nose and discharge around the eyes, explained Michael Q. Bailey, president-elect of the American Veterinary Medical Association.

H5N1 also causes neurological problems like dizziness and seizures, which are symptoms of rabies, too. Rabies is almost always fatal, and it poses a threat to human health, so any animal suspected of having the viral disease must be euthanized. Bailey encourages people to ensure pets are up-to-date on their vaccinations.

Veterinarian Jane Sykes, who specializes in infectious diseases in cats and dogs at the University of California-Davis School of Veterinary Medicine, said people should not assume it’s bird flu if their cat is sick — even if their animal spends time outdoors or eats a raw diet. Upper-respiratory illnesses are common in cats, while H5N1 is “still pretty rare.”

Sykes gives her indoor cat, Freckles, regular kibble exclusively. She told NPR and KFF Health News she has no concerns about Freckles getting H5N1 because the heating process of making dry or canned pet food kills viruses.

Some ways to reduce exposure to the H5N1 virus are not feeding pets raw food or unpasteurized milk and trying to keep them from interacting with animals that could be infected with the virus, such as rodents and wild birds.(iStock/Getty Images Plus)

More Cases in Cats, More Risk to Humans

Some people feed their pets raw meat or unpasteurized milk because they think it’s a more nutritious or natural diet. The American Veterinary Medical Association’s website discourages this due to foodborne pathogens like salmonella and listeria, and now the highly pathogenic H5N1.

By keeping pets healthy, veterinarians play an essential role in protecting humans from zoonotic diseases. The American Veterinary Medical Association says the risk of H5N1 spilling over from a pet to a person is “considered extremely low, but not zero.”

State and local public health agencies, including those in Los Angeles County and Washington state, have issued similar warnings against raw food diets for pets.

Concerns for human health are partly why the FDA announced last month it is now requiring cat and dog food companies to update their safety plans to protect against bird flu.

This came after the Oregon Department of Agriculture discovered a cat that was “strictly an indoor cat” had contracted H5N1 and died after consuming a frozen turkey product made by the raw pet food brand Northwest Naturals. It stated that “tests confirmed a genetic match between the virus in the raw and frozen pet food and the infected cat.”

Northwest Naturals voluntarily recalled that batch of its frozen turkey-based product. The company told KFF Health News and NPR that the recall involved “a small product run” and that it has concerns about the accuracy of the Oregon Agriculture Department’s testing.

Los Angeles County’s public health department said five cats from two households tested positive for bird flu after drinking unpasteurized raw milk from the Raw Farm dairy in California’s Central Valley.

Raw Farm voluntarily recalled its milk and cream after retail products tested positive for H5N1, but it denies any food safety issues, calling the concern “a political issue.”

Veterinarians also warn pet owners not to allow cats unsupervised time outside as there’s the risk of them getting H5N1 by interacting with other animals that might carry the disease.

“This is a very scary virus, given that it can infect so many different host species,” said Bruce Kornreich, director of Cornell University’s Feline Health Center.

At least one instance of a cat infecting a person with bird flu occurred in 2016. As NPR reported, a veterinarian in New York City caught the virus after having close contact with infected cats. The vet experienced mild symptoms and quickly recovered.

In that case, the strain of bird flu was H7N2, not the H5N1 that is now circulating in the U.S.

H7N2 is a very different type of virus, Sykes explained. But she said it shows that cat-to-human transmission of avian influenza is theoretically possible.

There isn’t a lot of research on transmission of bird flu from companion animals like cats or dogs to humans, though Rasmussen agreed it’s definitely a concern: The more infections you have in animals, “the more your luck is potentially going to run out.”

Most people who have caught H5N1 are agricultural workers who had direct contact with infected poultry or cattle. Of at least 67 confirmed human cases of H5N1 in the U.S., there’s been one fatality in an immunocompromised person who had contact with birds.

In general, zoonotic disease researchers want more H5N1 surveillance in companion animals of all types. Even if the human death toll of H5N1 remains relatively low, it remains a public health risk.

A black and white cat with a kitten at its side looks over at a cow lying on a bed of straw.
Barn cats that live on dairy farms are at higher risk of coming in contact with bird flu.(Westend61/Getty Images)

Chances for Mutation

Part of the concern with this H5N1 outbreak is that bird flu viruses change. Just a few mutations could make this strain adept at spreading between people. And the more people who catch H5N1, the more likely it would adapt to be more efficient, said Suresh Kuchipudi, a virologist at the University of Pittsburgh School of Public Health, where he researches zoonotic diseases. Kuchipudi has studied H5N1 in cats.

Another concern is something called reassortment. If an animal or person is infected with two viruses at once, the viruses can trade genetic material, creating something new. This is common in influenza, so virologists are on the lookout for a case in which the bird flu reassorts to make a virus that’s far more contagious, and potentially more virulent.

Virologist Rasmussen is way more worried about this happening in pigs. Human respiratory physiology is more like that of swines than felines. So far, the current outbreak of H5N1 has not reached commercial hog operations. Rasmussen hopes it stays that way.

Kuchipudi said that reassortments are relatively rare events, but the outcome is completely unpredictable. Sometimes the results are benign, though it was likely a reassortment that involved an avian virus that led to the 1918 flu pandemic, which killed an estimated 50 million people. In the century since, virologists have established a global surveillance network to monitor influenza viruses. Scientists say continued investment in this network is key to preparing for and hopefully preventing another pandemic.

Winter is “reassortment season” because of all the influenza viruses circulating, Rasmussen said. A reassortment in cats could technically be possible since these pets occasionally get seasonal flu, but it’s highly unlikely. Rather, Rasmussen said, it’s more likely that a cat would pass H5N1 to a human who already has seasonal flu, and then a reassortment happens in the sick person. While the risk isn’t zero, Rasmussen doubts this will happen. It would depend on how ill the human was, and how much virus they’re exposed to from their cat.

“Unless the cat is really shedding a ton of virus, and you’re kind of making out with the cat, I think it would be hard,” she said.

Rasmussen and Kuchipudi caution there isn’t enough research to know for sure how much virus cats shed, or even how they shed the virus.

The Centers for Disease Control and Prevention was poised to release a new study about H5N1 in cats, but that was delayed when the Trump administration paused the Morbidity and Mortality Weekly Report. That investigation, revealed through emails obtained by KFF Health News in a public records request, found that house cats likely got bird flu from dairy workers.

Scientists and public health agencies should question previously held assumptions about bird flu, Kuchipudi urged. He noted that 20 years ago nobody would have predicted that bird flu would infect dairy cattle as it is now.

Dogs Seem To Fare Better

The FDA says other domesticated animals, including dogs, can get bird flu infections. There are no confirmed cases of H5N1 among dogs in the U.S., though in other countries they have died from the virus.

There’s some disagreement and an overall lack of research on whether cat biology makes them more susceptible to H5N1 than other mammals, including humans, pigs, or dogs.

But cat behaviors, such as their love of dairy and predation of wild birds, put them at higher risk, Kuchipudi said. Also, living in groups might play a role as there are more feral cat colonies in the U.S. than packs of stray dogs.

There’s very little people can do about the H5N1 circulating in wild birds. As Rasmussen explained, “It’s flying around in the skies. It’s migrating north and south with the seasons.”

But she said there’s a lot people can do to keep the virus out of their homes.

That includes limiting a pet’s exposure to H5N1 by not feeding them raw food or unpasteurized milk, and trying to keep them from interacting with animals like rodents and wild birds that could be infected with the virus.

This article is from a partnership that includes NPR and KFF Health News.