Health
Scientists find clues on why COVID vaccine causes chronic health problems in some
For a majority of people, the COVID vaccine doesn’t cause adverse health effects — but a small percentage experience chronic symptoms that can last for months or even years.
Yale researchers recently made some discoveries about why certain people experience this condition, which they have dubbed “post-vaccination syndrome” (PVS).
In early findings, the team recognized “potential immunological patterns” that are unique to people with PVS. The hope is that this discovery will help to enable future treatments and therapies for those who are affected.
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“This work is still in its early stages, and we need to validate these findings,” said co-senior study author Akiko Iwasaki, Sterling Professor of Immunobiology at Yale School of Medicine, in a press release.
Yale researchers recently made some discoveries about why certain people experience “post-vaccination syndrome” (PVS). (iStock)
“But this is giving us some hope that there may be something that we can use for diagnosis and treatment of PVS down the road.”
Symptoms of post-vaccination syndrome
People with this condition may suffer from excessive fatigue, exercise intolerance, brain fog, insomnia and dizziness, according to the Yale researchers.
These typically develop within a day or two of vaccination and can worsen over time.
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“It’s clear that some individuals are experiencing significant challenges after vaccination. Our responsibility as scientists and clinicians is to listen to their experiences, rigorously investigate the underlying causes, and seek ways to help,” said co-senior author Harlan Krumholz, professor of cardiology at YSM, in the release.
“Post-vaccination syndrome is real, and has been found [to occur] from many vaccines, including COVID,” Dr. Marc Siegel, clinical professor of medicine at NYU Langone Health and Fox News senior medical analyst, told Fox News Digital.
What the study found
The researchers analyzed blood samples from 42 study participants who experienced symptoms of PVS and 22 who did not.
Those with symptoms were shown to have lower levels of two types of white blood cells. People with PVS who had never had COVID also had lower levels of antibodies against the SARS-CoV-2 spike protein, likely because they tended to have fewer vaccine doses, according to the release.
“Post-vaccination syndrome is real, and has been found [to occur] from many vaccines.”
“Fewer vaccine doses and no viral infection means the body’s immune system has had little opportunity to develop a defense to the virus,” said the researchers.
Some of the people with PVS also had higher levels of the SARS-CoV-2 spike protein, which enables the virus to penetrate and infect host cells. This has also been linked to a higher risk of developing long COVID.
“We don’t know if the level of spike protein is causing the chronic symptoms, because there were other participants with PVS who didn’t have any measurable spike protein — but it could be one mechanism underlying this syndrome,” said Iwasaki.
People with the syndrome may suffer from excessive fatigue, exercise intolerance, brain fog, insomnia and dizziness, according to the Yale researchers. (iStock)
In addition to the elevated spike proteins, other factors could increase the risk of post-vaccination syndrome. Those include autoimmunity, tissue damage and reactivation of Epstein-Barr virus (EBV), the researchers wrote.
“Akiko Iwasaka is a world-renowned immunologist at Yale who has studied COVID (and COVID vaccines) extensively,” Siegel pointed out.
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“In this new study, she reports that in a very small percentage of those who received COVID vaccines (and experienced prolonged side effects), there may be the presence of persistent spike protein,” Siegel confirmed.
“They may also experience immune disruption, which takes the form of elevations in inflammatory immune cells (CD8 and TN alpha) and a decrease in cells that help resolve inflammation and infection (CD4 helper cells).”
“Every medical intervention carries some risk, and it’s important to acknowledge that adverse events can occur with vaccines.” (REUTERS/Dado Ruvic/Illustration/File Photo)
The researchers agreed that more studies are essential to guide diagnosis and treatment.
“We’re only just starting to make headway in understanding PVS,” said Krumholz. “Every medical intervention carries some risk, and it’s important to acknowledge that adverse events can occur with vaccines.”
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“Our focus must remain on understanding what these people are experiencing through rigorous science and addressing the needs of those affected with compassion and an open mind.”
Siegel agreed, adding, “This needs to be further studied in terms of understanding how common prolonged COVID vaccine side effects are and how to predict them and treat them.”
Health
‘Weight Loss Has Never Been About Calories’: How This Low-Insulin Diet Helped Lillie, 58, Drop 70 Lbs!
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Health
Weight-loss experts predict 5 major treatment changes likely to emerge in 2026
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Big moves are continuing in the weight loss landscape in the new year following breakthrough research of GLP-1 medications and other methods.
Weight-loss experts spoke with Fox News Digital about their predictions for the most major changes to come in 2026.
No. 1: Shift to whole-body treatment
Dr. Peter Balazs, a hormone and weight loss specialist in New York and New Jersey, shared that the most important shift is likely to label GLP-1 drugs as “multi-system metabolic modulators” rather than “simple weight loss drugs.”
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“The treatment goal is no longer just BMI reduction, but total cardiometabolic risk mitigation, with effects now documented across the liver, heart, kidneys and vasculature,” he said.
“We are seeing a significant reduction in major adverse cardiovascular events … and progression of renal disease,” he went on.
The focus of GLP-1 drugs will widen beyond weight loss and diabetes, according to experts’ predictions. (iStock)
Philip Rabito, M.D., a specialist in endocrinology, weight loss and wellness in New York City, also shared that “exciting” advancements lie ahead for weight-loss drugs, including GLP-1s and GIPs.
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“These next‑generation agents, along with novel combinations that include glucagon and amylin agonists, are demonstrating even more impressive weight‑loss outcomes than currently available therapies, with the potential for better tolerability and sustained results,” he told Fox News Digital.
“There is also tremendous optimism around new federal agreements with manufacturers that aim to make these medications more widely accessible and affordable for the broad population of patients who need them most.”
No. 2: More convenient dosing
The typical prescription for a GLP-1 medication is a weekly injection, but delivery and dosing may be changing to more convenient methods in 2026, according to Balazs.
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A daily 25 mg pill version of Novo Nordisk’s Wegovy, a semaglutide designed to treat obesity, is now approved and available for chronic weight management, offering a non-injectable option for some patients.
A once-weekly oral GLP-1 is currently in phase 2 trials, as well as an implant that aims for three to six months of drug delivery, Balazs noted.
Incisionless weight-loss procedures will rise as a lower-risk option, according to experts. (iStock)
No. 3: Less invasive surgery
In addition to decreased risk during surgery for GLP-1 users, Balazs also predicted that metabolic surgery without incision will rise as a better option.
“Incisionless endoscopic procedures — like endoscopic sleeve gastroplasty (non-surgical weight-loss procedure that makes the stomach smaller from the inside) and duodenal mucosal resurfacing (non-surgical procedure that resets part of the small intestine to help the body better handle blood sugar) — [may become] more durable and widely available,” he said.
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“These offer significant metabolic benefits with shorter recovery and lower risk than traditional surgery.”
Rabito agreed that “rapid progress” in minimally invasive weight‑loss procedures is “opening powerful new options for patients who are hesitant to pursue traditional bariatric surgery.”
Bariatric surgery remains the most effective weight loss method, one specialist says. (iStock)
This avenue offers “meaningful and durable weight reduction with less risk, shorter recovery times and no external incisions,” the expert added.
Dr. Muhammad Ghanem, bariatric surgeon at the Orlando Health Weight Loss & Bariatric Surgery Institute, reiterated that surgery remains “the most successful modality for the treatment of obesity … with the highest weight loss and most durable outcomes as of yet.”
No. 4: Younger GLP-1 users
As Novo Nordisk’s Wegovy has been indicated for adolescents over 12 years old as an obesity treatment, Balazs commented that pediatric use of weight-loss drugs is “now a clinical reality.”
He predicted that other alternatives are likely to be approved in 2026 for younger users.
No. 5: High-tech, personalized access
Amid the growth of artificial intelligence, Balazs predicted an expansion in the clinical implementation of AI-driven weight-loss methods.
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This could include categorizing obesity into sub-types like “hungry brain,” “emotional hunger” and “slow burn” to personalize how therapy is prescribed while moving away from “trial and error,” he said.
Ghanem agreed that there will likely be a “big focus” on individualized testing for causes of obesity in 2026, as it’s a disease that can have “different causes in different people,” thus requiring different treatments.
AI and other digital opportunities will drive more access for weight-loss patients, experts say. (iStock)
The doctor anticipates that more patients will seek combinations of comprehensive treatments and programs.
“Patients are more aware that now we have a few weapons in our arsenal to combat obesity, and [they] are seeking a multidisciplinary and holistic approach,” Ghanem said.
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Treatment options will also turn digital with the rise of prescription digital therapeutics (PDTs) for weight loss, Balazs predicted.
“These are software applications delivering cognitive behavioral therapy, personalized nutrition and metabolic coaching through algorithms, often integrated with continuous glucose monitors, and reimbursed as medical treatments,” he said.
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Ghanem added that body composition analyzers, like DEXA scans, will likely be more widely used as awareness grows about the limitations of BMI and weight in assessing obesity.
Health
Brain Health Challenge: Doctor Appointments for Your Mind and Body
Congratulations, you’ve reached the final day of the Brain Health Challenge! Today, we’re asking you to do a few things that might feel a bit out of left field — like getting your blood pressure checked.
No, it isn’t as fun as playing Pips, but experts say it’s one of the most important things you can do for your brain. That’s because heart health and brain health are intrinsically linked.
High blood pressure, in particular, can damage brain cells, and it’s a significant risk factor for stroke and dementia. When blood pressure is too high, it places stress on the walls of arteries in the brain. Over time, that added stress can cause the blood vessel walls to thicken, obstructing blood flow. In other cases, the increased pressure causes the artery walls to thin and leak blood into the brain.
These changes to the blood vessels can sometimes cause a large stroke to occur. More commonly, the damage leads to micro-strokes and micro-hemorrhages, which cause fewer immediate problems and often go unnoticed. But if someone has hypertension for years or decades, these injuries can build up, and the person may start to experience cognitive impairment.
High blood pressure “is known as a silent killer for lots of reasons,” said Dr. Shyam Prabhakaran, the chair of neurology at the University of Chicago. “It doesn’t cause you any symptoms until it does.”
Because the damage accumulates over many years, experts say that managing blood pressure in midlife matters most for brain health. Hypertension can be addressed with medication or lifestyle changes, as directed by your doctor. But the first thing you need to do is know your numbers. If your blood pressure comes back higher than 120/80, it’s important to take it seriously, Dr. Prabhakaran said.
While you’re at it, there are a few other aspects of your physical health that you should check on.
Your eyes and ears are two of them. Hearing and vision loss have both been shown to increase the risk of dementia. Experts think that with less sensory information coming in to stimulate the brain, the regions that process hearing and vision can start to atrophy. What’s more, people with sensory loss often withdraw or are left out of social interactions, further depriving them of cognitive stimulation.
Oral health can also affect your brain health. Research has found a connection between regular flossing and reduced odds of having a stroke. That may be because good oral health can help to reduce inflammation in the body. The bacteria that cause gum disease have also been tied to an increased risk of Alzheimer’s.
And have you gotten your shingles vaccine? There is mounting evidence that it’s a powerful weapon for protecting against dementia. One study found that it lowered people’s odds of developing the condition by as much as 20 percent.
To wrap up this challenge, we want you to schedule a few medical appointments that benefit your brain, as well as your body.
After five days of feeding, exercising and challenging your brain, you are well on your way to better cognitive health. Thanks for joining me this week, and keep up the good habits!
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