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Flu by state: Where this season’s highly contagious variant is spreading the most

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Flu by state: Where this season’s highly contagious variant is spreading the most

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A new form of the flu, which is highly contagious and aggressive, is sweeping the nation this season.

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A mutation of influenza A H3N2, called subclade K, has been detected as the culprit in rising global cases, including in the U.S.

The World Health Organization stated on its website that the K variant marks “a notable evolution in influenza A (H3N2) viruses,” which some say calls into question the effectiveness of this season’s influenza vaccine against the strain.

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The K variant causes more intense flu symptoms, including fever, chills, headache, fatigue, cough, sore throat and runny nose, according to experts.

Multiple states in the northeast are reporting high rates of respiratory illness this month. (iStock)

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Among 216 influenza A(H3N2) viruses collected since Sept. 28, 89.8% belonged to subclade K, a CDC report states.

The agency continues to release a weekly influenza surveillance report, tracking which states are seeing the most activity for outpatient respiratory illness.

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Below are the states and regions within the highest range of reported medical visits, not necessarily confirmed influenza cases, as of the week ending Dec. 13.

The CDC’s weekly influenza surveillance report, an outpatient respiratory illness activity map, based on data reported to ILINet for the week ending Dec. 13, 2025. (CDC FluView)

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Very High (Level 1)

Very High (Level 2)

Very High (Level 3)

  • New Jersey
  • Rhode Island
  • Louisiana
  • Colorado

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High (Level 1)

  • Massachusetts
  • Connecticut
  • Michigan
  • Idaho
  • South Carolina

High (Level 2)

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High (Level 3)

  • Washington, D.C.
  • Maryland
  • North Carolina
  • Georgia

The CDC has estimated that there have been at least 4.6 million illnesses, 49,000 hospitalizations and 1,900 flu deaths this season so far. The flu vaccine is recommended as the best line of defense against the virus.

 The flu vaccine is recommended as the best line of defense against the virus. (iStock)

In an interview with Fox News Digital, Dr. Neil Maniar, professor of public health practice at Boston’s Northeastern University, shared details on the early severity of this emerging flu strain.

“It’s becoming evident that this is a pretty severe variant of the flu,” he said. “Certainly, in other parts of the world where this variant has been prevalent, it’s caused some severe illness, and we’re seeing an aggressive flu season already.”

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Subclade K is the “perfect storm” for an aggressive flu season, Maniar suggested, as vaccination rates overall are down, and it’s uncertain whether this year’s flu vaccine directly addresses this specific mutation.

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“The vaccine is very important to get, but because it’s not perfectly aligned with this variant, I think that’s also contributing to some degree to the severity of cases we’re seeing,” he said. “We’re going in [to this flu season] with lower vaccination rates and a variant that in itself seems to be more aggressive.”

Subclade K has “caused some severe illness, and we’re seeing an aggressive flu season already,” a doctor said. (iStock)

Maniar stressed that it’s not too late to get the flu vaccine, as peak flu season has not yet arrived.

“The vaccine still provides protection against serious illness resulting from the subclade K variant that seems to be going around,” he said. “There are likely to be lots of indoor gatherings and other events that create risk of exposure, so protection is important.”

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Even healthy individuals can become seriously ill from the flu, Maniar noted, “so a vaccine is beneficial for almost everyone.”

“Individuals typically start to develop some degree of protection within a few days and gain the full benefit within about two weeks, so now is the time for anyone who hasn’t gotten the vaccine yet.”

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This everyday drinking pattern could quietly raise liver disease risk

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This everyday drinking pattern could quietly raise liver disease risk

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Widespread drinking habit could triple risk of advanced liver condition

Deadly bacterial disease could be stopped by pantry staple

Common vaccine slashes Alzheimer’s disease risk when dose is increased

Even occasional binge drinking could triple the risk of a serious liver condition, a new study suggests. (iStock)

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Monica Deyanira Cabrera Barajas, 26, underwent a 20-minute extraction that turned into a high-stakes medical procedure. (Jam Press)

Conversation starters

→ Woman swallows nose ring, finds it traveled to her lungs

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Common vaccine slashes Alzheimer’s disease risk when dose is increased

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Common vaccine slashes Alzheimer’s disease risk when dose is increased

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A new, stronger flu shot could slash Alzheimer’s risk in half, according to new data.

The study, led by researchers at the University of Texas Health Science Center at Houston (UTHealth), found that adults 65 and older who received a high-dose influenza vaccine had a significantly lower risk of developing Alzheimer’s disease compared to those who received the standard dose.

The immune system naturally weakens with age, making older adults less responsive to standard vaccines. To combat this, the Centers for Disease Control and Prevention recommends a high-dose flu vaccine for people over 65. This version is approximately four times stronger than the standard shot.

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Alzheimer’s disease, a brain disorder that slowly destroys memory and thinking skills, affects more than 6 million Americans, most of them age 65 or older.

Dr. Marc Siegel, a Fox News senior medical contributor, weighed in on the impact of the flu shot on Alzheimer’s risk.

Alzheimer’s disease, a brain disorder that slowly destroys memory and thinking skills, affects more than 6 million Americans, most of them age 65 or older. (iStock)

As the vaccine directly affects the immune system, it is possible that this interaction could decrease inflammation in the body and “thereby indirectly decrease Alzheimer’s risk,” Siegel, who was not involved in the research, told Fox News Digital.

“Flu shots and their components do not cross the blood-brain barrier, meaning they aren’t directly affecting brain cells.”

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“We can’t conclude from this that it is the flu shot itself that causes the effect.”

“I was stunned that, as a physician, I didn’t know a higher dose was offered,” lead study author Paul Schulz, professor of neurology at McGovern Medical School at UTHealth, said in a press release.

Schulz also led a previous study linking general flu vaccination to a 40% reduction in Alzheimer’s risk.

While the previous research had already linked general flu vaccination to a reduction in Alzheimer’s risk, this new study looked specifically at the strength of the dose.

POPULAR DIET TIED TO LOWER DEMENTIA RISK FOR SOME GROUPS, STUDY REVEALS

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“The public health department had seen our vaccine research and asked if I could come down to talk to them about it,” said Schulz. “We went through the findings, and they asked if there was a difference with different dosages; I was confused.”

Adults who received the quadruple-strength vaccine had a lower risk of Alzheimer’s than those who received the standard dose. (iStock)

After sorting through data from nearly 200,000 older adults, the team found the adults who received the high-dose vaccine had a lower risk of Alzheimer’s than those who received the standard dose.

Adults in the high-dose group had an almost 55% lower risk than those who weren’t vaccinated, significantly outperforming standard-dose protection.

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The protective effect of the high-dose vaccine was even more pronounced in women compared to men, although both groups saw significant benefits.

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This study shows a link, not a cause, the researchers noted.

Experts can’t say for certain that the flu shot itself stopped Alzheimer’s because people who get high-dose vaccines might also have other healthy habits, like better diets or more frequent check-ups.

The study focused on people over 65, so it’s unclear whether getting these shots earlier in life would provide the same level of protection. (iStock)

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The researchers also looked at medical records after the fact, rather than following two controlled groups in real time, which can sometimes result in missing information or biases.

“This is not a cause/effect study,” Siegel reiterated. “We can’t conclude that the flu shot itself causes the effect; it could be something about the people who decide to take this shot.”

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The study also focused on people over 65, so it’s unclear whether getting these shots earlier in life would provide the same level of protection.

“This needs to be further studied, but it is already certainly another reason to take a flu shot,” Siegel added.

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The study was published in the journal Neurology.

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Woman discovers missing nose ring traveled to her lungs, causing month-long cough

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Woman discovers missing nose ring traveled to her lungs, causing month-long cough

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A TikToker in Mexico thought her cough that wouldn’t go away was just a reaction to the changing weather. Instead, it was her own nose ring, lodged deep within her lungs.

The 26-year-old, Monica Deyanira Cabrera Barajas, recently went viral on TikTok, amassing 4.7 million views after revealing the freak medical accident.

In videos, she shared that the stray accessory sat a mere 0.5 millimeters from her aorta, Jam Press reported.

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Deyanira, who has a large number of piercings, didn’t initially notice the jewelry was missing. It wasn’t until she developed a “chronic cough” lasting over a month that she went to see a doctor.

“The only theory I have, which I told the pulmonologist, is that I fell asleep, the little ball fell out, and that was it,” Deyanira told creatorzine.com.

What was supposed to be a routine 20-minute extraction turned into a high-stakes medical procedure. (Jam Press)

“I was lying on my back, I didn’t realize, and that’s how I messed up.”

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What was supposed to be a routine 20-minute extraction turned into a high-stakes medical procedure. During the initial attempt, surgeons were unable to budge the object because it had already begun attaching to her internal tissue.

“It ended up taking an hour and 20 minutes, and they still couldn’t remove it because it was attached to my body,” she said, according to the Jam Press report.

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Facing a second, more invasive surgery and the risk of a fatal hemorrhage, Deyanira prepared for the worst. The night before the surgery, she wrote a farewell letter to her loved ones.

The nose ring was lodged dangerously close to her aorta, the body’s primary artery. (Jam Press)

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“I was honestly thinking, ‘I’m going to die,’” she said. “It’s a horror I wouldn’t wish on anyone.”

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The woman’s surgeon was equally stunned by how close the metal was to her heart. According to Deyanira, the doctor told her, “It seems God takes care of his creatures.”

If the metal had punctured her lung or heart before doctors discovered it, Deyanira said she likely would have died from a lung collapse or perforated aorta.

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Now, the TikToker says her days of septum rings are over.

After the ordeal, Deyanira said she’s permanently done with piercings. (Jam Press)

“I love piercings, and I really liked my septum piercing, but in my case, I wouldn’t get it again because of the terror I experienced,” she said.

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Followers commented that the ordeal “unlocked a fear I didn’t know I had.”

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