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Gut reaction: How the gut microbiome may influence the severity of COVID-19

Gut reaction: How the gut microbiome may influence the severity of COVID-19

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The gut microbiome is the community of micro-organisms living inside the gastrointestinal tract, which performs many beneficial functions, including educating the immune system. (Shutterstock))

The risk of severe COVID-19 infection is more common in those with high blood pressure, diabetes and obesity, conditions that are all associated with changes to the composition of the gut microbiome — the community of bacteria, viruses and fungi that live in the intestines. This raises the question of whether the gut microbiome has a role in dictating COVID-19 severity.

Let’s recap what we know about COVID-19. COVID-19 is a new disease caused by a very contagious virus called SARS-CoV-2.

In most infected individuals, the virus does not cause serious illness. However, it causes a very serious respiratory disease — and even death — in a minority of patients. Through many studies of people with COVID-19 over the past few months, we have learned what characteristics are more likely to be linked to mild versus severe forms of the disease.

Who is predisposed to serious COVID-19?

Coronavirus causes respiratory infections. (Piqsels)

Children and young adults are less likely to develop symptomatic COVID-19, although infection readily occurs in young people with equally high viral loads in the airway, suggesting that they can certainly infect others. In contrast, people of older age and those with pre-existing chronic conditions are highly at risk and very likely develop symptomatic, severe disease.

If we consider the gradient of severity of the disease, children are at one end, and the elderly and patients with chronic conditions are at the other end.

What conditions are linked to severe COVID-19?

The information collected by researchers from many countries all points to similar characteristics and health conditions that are more commonly seen in patients with severe disease. These include older age, high blood pressure, diabetes and obesity.

The strength of these associations is even more prominent among younger individuals, as younger patients with obesity and diabetes are more likely to have serious disease.

In New York City, 5,279 patients tested positive for COVID-19 between March 1 and April 8, 2020. Of these, 22.6 per cent had diabetes and 35.3 per cent were obese.

Obesity was associated with an increased rate of hospital admission and critical illness. Similar findings were provided by investigators in the United Kingdom about the outbreak in Britain, where obese patients were twice as likely to develop severe disease.

Do these findings raise the possibility that the mechanisms underlying high blood pressure, diabetes and obesity may help explain why these conditions lead to severe COVID-19 disease? Before exploring this question, let’s zoom in on cellular and molecular mechanisms known to be involved in COVID-19 disease.

How does the body fight COVID-19 infection?

When the virus enters the body, it mostly goes to the airways and the gastrointestinal tract. The virus then binds to specific receptors present on the surface of epithelial cells to enter these cells. Viral replication within the cells leads to cell damage and cell death. This results in the release of specific signalling molecules that alert the local immune system.

Illustration of the initial stage of COVID-19 infection: SARS-CoV-2 virus particles binding to specific receptors on the surface of cells. (Shutterstock)

Armies of immune cells are then dispatched to initiate an antiviral response. Some of these cells are specialized to locate and identify the virus, while others mount a specific immune attack. The immune response results in the release of cytokines, chemokines and antibodies, which in many cases can defeat the virus, and the patient recovers.

Sometimes the immune system is dangerously at high alert and overreacts. In this case, the immune cells mount an especially strong inflammatory response — one that goes beyond what is required to kill the virus. This extra-strong attack releases cytokines and chemokines on a massive scale throughout the body, resulting in a cytokine storm, which causes widespread inflammation and tissue damage in patients with severe COVID-19.

One of the reasons for an abnormal, overreactive immune response lies in the gastrointestinal tract. Millions of interactions are constantly occurring between the immune system and trillions of non-dangerous microbes that live within the body. These interactions educate the immune system in how to function and, importantly, in how not to overreact to infectious microbes. Could this help explain why some people are more likely to develop uncontrolled inflammation upon COVID-19 infection?

Trillions of micro-organisms that call your gastrointestinal tract home

You’ve got a trillion friends in low places: bacteria in the gut may protect against viruses by signalling their presence to the immune system. (Piqsels)

The gut microbiome is the community of micro-organisms living inside the gastrointestinal tract, mostly in the large bowel. The microbiome contains bacteria, fungi (yeast), viruses and protozoa, all of which contribute to maintaining a balanced ecosystem and human health. These microbes collectively perform many beneficial functions, including educating the immune system.

When studying the microbiome, scientists examine the composition (what is there) and function (what are they doing) of this ecosystem. We have learned that both composition and function of the gut microbiome are important features linked to human health. In certain conditions, the balance of the gut microbiome composition and function is disrupted in a way that leads to disease, a phenomenon called microbiome dysbiosis.

There is accumulating evidence from animal and human studies that gut microbiome dysbiosis has a causal role in metabolism dysregulation manifested as diabetes and obesity — the risk factors of severe COVID-19 disease.

Is gut microbiome predisposing patients to severe COVID-19?

The gut microbiome regulates host defences against viral infections including respiratory viruses, such as influenza virus. This occurs through the activation of immune antiviral mechanisms and the prevention of excessive inflammation.

Different species of the gut microbiome have pro- or anti-inflammatory properties and play different roles in regulating the immune system. In the context of COVID-19, a recent preprint study (not yet peer reviewed) showed that specific members of the gut microbiome were associated with severe disease and with immune markers known to be elevated in severe disease. The association of these gut bacteria with the immune markers was even higher than that of the known risk factors of COVID-19 severity: age and obesity.

Further work is needed to confirm that pro-inflammatory microbial species can contribute to the immune responses that make severe COVID-19 more likely, but based on what we know about the microbiome, this is certainly a possibility. This also could mean that beneficial gut microbiome species, the type that promote low inflammation, have the potential to prevent or remediate the immune alterations that lead to severe COVID-19.

Potential for treatments and prevention

The research community is working very hard to develop and test safe and effective vaccines and treatments against COVID-19. Tapping into the potential of the gut microbiome is another avenue that we can pursue to identify potential safe and affordable probiotics for prevention and treatment. This is not unprecedented in the context of viral respiratory diseases: probiotics and prebiotics can affect the immune response to the flu vaccine, and may improve outcomes in flu-like illnesses.

Until effective treatments are available, “mind your microbes” and maintain a healthy lifestyle.

Shirin Moossavi receives funding from Canadian Institute of Health Research.

Marie-Claire Arrieta receives funding from the Cumming School of Medicine, the Alberta Children Hospital Research Institute, the Snyder Institute of Chronic Diseases, the Canadian Institutes for Health Research, the Sick Kids Foundation, the W. Garfield Weston Foundation, and the Canadian Lung Association. She is affiliated with the University of Calgary.

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Looking Back At COVID’s Authoritarian Regimes

After having moved from Canada to the United States, partly to be wealthier and partly to be freer (those two are connected, by the way), I was shocked,…

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2 hours ago

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March 15, 2024

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After having moved from Canada to the United States, partly to be wealthier and partly to be freer (those two are connected, by the way), I was shocked, in March 2020, when President Trump and most US governors imposed heavy restrictions on people’s freedom. The purpose, said Trump and his COVID-19 advisers, was to “flatten the curve”: shut down people’s mobility for two weeks so that hospitals could catch up with the expected demand from COVID patients. In her book Silent Invasion, Dr. Deborah Birx, the coordinator of the White House Coronavirus Task Force, admitted that she was scrambling during those two weeks to come up with a reason to extend the lockdowns for much longer. As she put it, “I didn’t have the numbers in front of me yet to make the case for extending it longer, but I had two weeks to get them.” In short, she chose the goal and then tried to find the data to justify the goal. This, by the way, was from someone who, along with her task force colleague Dr. Anthony Fauci, kept talking about the importance of the scientific method. By the end of April 2020, the term “flatten the curve” had all but disappeared from public discussion.

Now that we are four years past that awful time, it makes sense to look back and see whether those heavy restrictions on the lives of people of all ages made sense. I’ll save you the suspense. They didn’t. The damage to the economy was huge. Remember that “the economy” is not a term used to describe a big machine; it’s a shorthand for the trillions of interactions among hundreds of millions of people. The lockdowns and the subsequent federal spending ballooned the budget deficit and consequent federal debt. The effect on children’s learning, not just in school but outside of school, was huge. These effects will be with us for a long time. It’s not as if there wasn’t another way to go. The people who came up with the idea of lockdowns did so on the basis of abstract models that had not been tested. They ignored a model of human behavior, which I’ll call Hayekian, that is tested every day.

These are the opening two paragraphs of my latest Defining Ideas article, “Looking Back at COVID’s Authoritarian Regimes,” Defining Ideas, March 14, 2024.

Another excerpt:

That wasn’t the only uncertainty. My daughter Karen lived in San Francisco and made her living teaching Pilates. San Francisco mayor London Breed shut down all the gyms, and so there went my daughter’s business. (The good news was that she quickly got online and shifted many of her clients to virtual Pilates. But that’s another story.) We tried to see her every six weeks or so, whether that meant our driving up to San Fran or her driving down to Monterey. But were we allowed to drive to see her? In that first month and a half, we simply didn’t know.

Read the whole thing, which is longer than usual.

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Problems After COVID-19 Vaccination More Prevalent Among Naturally Immune: Study

Problems After COVID-19 Vaccination More Prevalent Among Naturally Immune: Study

Authored by Zachary Stieber via The Epoch Times (emphasis…

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5 hours ago

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March 15, 2024

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Problems After COVID-19 Vaccination More Prevalent Among Naturally Immune: Study

Authored by Zachary Stieber via The Epoch Times (emphasis ours),

People who recovered from COVID-19 and received a COVID-19 shot were more likely to suffer adverse reactions, researchers in Europe are reporting.

A medical worker administers a dose of the Pfizer-BioNTech COVID-19 vaccine to a patient at a vaccination center in Ancenis-Saint-Gereon, France, on Nov. 17, 2021. (Stephane Mahe//Reuters)

Participants in the study were more likely to experience an adverse reaction after vaccination regardless of the type of shot, with one exception, the researchers found.

Across all vaccine brands, people with prior COVID-19 were 2.6 times as likely after dose one to suffer an adverse reaction, according to the new study. Such people are commonly known as having a type of protection known as natural immunity after recovery.

People with previous COVID-19 were also 1.25 times as likely after dose 2 to experience an adverse reaction.

The findings held true across all vaccine types following dose one.

Of the female participants who received the Pfizer-BioNTech vaccine, for instance, 82 percent who had COVID-19 previously experienced an adverse reaction after their first dose, compared to 59 percent of females who did not have prior COVID-19.

The only exception to the trend was among males who received a second AstraZeneca dose. The percentage of males who suffered an adverse reaction was higher, 33 percent to 24 percent, among those without a COVID-19 history.

“Participants who had a prior SARS-CoV-2 infection (confirmed with a positive test) experienced at least one adverse reaction more often after the 1st dose compared to participants who did not have prior COVID-19. This pattern was observed in both men and women and across vaccine brands,” Florence van Hunsel, an epidemiologist with the Netherlands Pharmacovigilance Centre Lareb, and her co-authors wrote.

There were only slightly higher odds of the naturally immune suffering an adverse reaction following receipt of a Pfizer or Moderna booster, the researchers also found.

The researchers performed what’s known as a cohort event monitoring study, following 29,387 participants as they received at least one dose of a COVID-19 vaccine. The participants live in a European country such as Belgium, France, or Slovakia.

Overall, three-quarters of the participants reported at least one adverse reaction, although some were minor such as injection site pain.

Adverse reactions described as serious were reported by 0.24 percent of people who received a first or second dose and 0.26 percent for people who received a booster. Different examples of serious reactions were not listed in the study.

Participants were only specifically asked to record a range of minor adverse reactions (ADRs). They could provide details of other reactions in free text form.

“The unsolicited events were manually assessed and coded, and the seriousness was classified based on international criteria,” researchers said.

The free text answers were not provided by researchers in the paper.

“The authors note, ‘In this manuscript, the focus was not on serious ADRs and adverse events of special interest.’” Yet, in their highlights section they state, “The percentage of serious ADRs in the study is low for 1st and 2nd vaccination and booster.”

Dr. Joel Wallskog, co-chair of the group React19, which advocates for people who were injured by vaccines, told The Epoch Times: “It is intellectually dishonest to set out to study minor adverse events after COVID-19 vaccination then make conclusions about the frequency of serious adverse events. They also fail to provide the free text data.” He added that the paper showed “yet another study that is in my opinion, deficient by design.”

Ms. Hunsel did not respond to a request for comment.

She and other researchers listed limitations in the paper, including how they did not provide data broken down by country.

The paper was published by the journal Vaccine on March 6.

The study was funded by the European Medicines Agency and the Dutch government.

No authors declared conflicts of interest.

Some previous papers have also found that people with prior COVID-19 infection had more adverse events following COVID-19 vaccination, including a 2021 paper from French researchers. A U.S. study identified prior COVID-19 as a predictor of the severity of side effects.

Some other studies have determined COVID-19 vaccines confer little or no benefit to people with a history of infection, including those who had received a primary series.

The U.S. Centers for Disease Control and Prevention still recommends people who recovered from COVID-19 receive a COVID-19 vaccine, although a number of other health authorities have stopped recommending the shot for people who have prior COVID-19.

Another New Study

In another new paper, South Korean researchers outlined how they found people were more likely to report certain adverse reactions after COVID-19 vaccination than after receipt of another vaccine.

The reporting of myocarditis, a form of heart inflammation, or pericarditis, a related condition, was nearly 20 times as high among children as the reporting odds following receipt of all other vaccines, the researchers found.

The reporting odds were also much higher for multisystem inflammatory syndrome or Kawasaki disease among adolescent COVID-19 recipients.

Researchers analyzed reports made to VigiBase, which is run by the World Health Organization.

“Based on our results, close monitoring for these rare but serious inflammatory reactions after COVID-19 vaccination among adolescents until definitive causal relationship can be established,” the researchers wrote.

The study was published by the Journal of Korean Medical Science in its March edition.

Limitations include VigiBase receiving reports of problems, with some reports going unconfirmed.

Funding came from the South Korean government. One author reported receiving grants from pharmaceutical companies, including Pfizer.

Tyler Durden Fri, 03/15/2024 - 05:00

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‘Excess Mortality Skyrocketed’: Tucker Carlson and Dr. Pierre Kory Unpack ‘Criminal’ COVID Response

‘Excess Mortality Skyrocketed’: Tucker Carlson and Dr. Pierre Kory Unpack ‘Criminal’ COVID Response

As the global pandemic unfolded, government-funded…

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17 hours ago

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March 14, 2024

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'Excess Mortality Skyrocketed': Tucker Carlson and Dr. Pierre Kory Unpack 'Criminal' COVID Response

As the global pandemic unfolded, government-funded experimental vaccines were hastily developed for a virus which primarily killed the old and fat (and those with other obvious comorbidities), and an aggressive, global campaign to coerce billions into injecting them ensued.

Then there were the lockdowns - with some countries (New Zealand, for example) building internment camps for those who tested positive for Covid-19, and others such as China welding entire apartment buildings shut to trap people inside.

It was an egregious and unnecessary response to a virus that, while highly virulent, was survivable by the vast majority of the general population.

Oh, and the vaccines, which governments are still pushing, didn't work as advertised to the point where health officials changed the definition of "vaccine" multiple times.

Tucker Carlson recently sat down with Dr. Pierre Kory, a critical care specialist and vocal critic of vaccines. The two had a wide-ranging discussion, which included vaccine safety and efficacy, excess mortality, demographic impacts of the virus, big pharma, and the professional price Kory has paid for speaking out.

Keep reading below, or if you have roughly 50 minutes, watch it in its entirety for free on X:

"Do we have any real sense of what the cost, the physical cost to the country and world has been of those vaccines?" Carlson asked, kicking off the interview.

"I do think we have some understanding of the cost. I mean, I think, you know, you're aware of the work of of Ed Dowd, who's put together a team and looked, analytically at a lot of the epidemiologic data," Kory replied. "I mean, time with that vaccination rollout is when all of the numbers started going sideways, the excess mortality started to skyrocket."

When asked "what kind of death toll are we looking at?", Kory responded "...in 2023 alone, in the first nine months, we had what's called an excess mortality of 158,000 Americans," adding "But this is in 2023. I mean, we've  had Omicron now for two years, which is a mild variant. Not that many go to the hospital."

'Safe and Effective'

Tucker also asked Kory why the people who claimed the vaccine were "safe and effective" aren't being held criminally liable for abetting the "killing of all these Americans," to which Kory replied: "It’s my kind of belief, looking back, that [safe and effective] was a predetermined conclusion. There was no data to support that, but it was agreed upon that it would be presented as safe and effective."

Carlson and Kory then discussed the different segments of the population that experienced vaccine side effects, with Kory noting an "explosion in dying in the youngest and healthiest sectors of society," adding "And why did the employed fare far worse than those that weren't? And this particularly white collar, white collar, more than gray collar, more than blue collar."

Kory also said that Big Pharma is 'terrified' of Vitamin D because it "threatens the disease model." As journalist The Vigilant Fox notes on X, "Vitamin D showed about a 60% effectiveness against the incidence of COVID-19 in randomized control trials," and "showed about 40-50% effectiveness in reducing the incidence of COVID-19 in observational studies."

Professional costs

Kory - while risking professional suicide by speaking out, has undoubtedly helped save countless lives by advocating for alternate treatments such as Ivermectin.

Kory shared his own experiences of job loss and censorship, highlighting the challenges of advocating for a more nuanced understanding of vaccine safety in an environment often resistant to dissenting voices.

"I wrote a book called The War on Ivermectin and the the genesis of that book," he said, adding "Not only is my expertise on Ivermectin and my vast clinical experience, but and I tell the story before, but I got an email, during this journey from a guy named William B Grant, who's a professor out in California, and he wrote to me this email just one day, my life was going totally sideways because our protocols focused on Ivermectin. I was using a lot in my practice, as were tens of thousands of doctors around the world, to really good benefits. And I was getting attacked, hit jobs in the media, and he wrote me this email on and he said, Dear Dr. Kory, what they're doing to Ivermectin, they've been doing to vitamin D for decades..."

"And it's got five tactics. And these are the five tactics that all industries employ when science emerges, that's inconvenient to their interests. And so I'm just going to give you an example. Ivermectin science was extremely inconvenient to the interests of the pharmaceutical industrial complex. I mean, it threatened the vaccine campaign. It threatened vaccine hesitancy, which was public enemy number one. We know that, that everything, all the propaganda censorship was literally going after something called vaccine hesitancy."

Money makes the world go 'round

Carlson then hit on perhaps the most devious aspect of the relationship between drug companies and the medical establishment, and how special interests completely taint science to the point where public distrust of institutions has spiked in recent years.

"I think all of it starts at the level the medical journals," said Kory. "Because once you have something established in the medical journals as a, let's say, a proven fact or a generally accepted consensus, consensus comes out of the journals."

"I have dozens of rejection letters from investigators around the world who did good trials on ivermectin, tried to publish it. No thank you, no thank you, no thank you. And then the ones that do get in all purportedly prove that ivermectin didn't work," Kory continued.

"So and then when you look at the ones that actually got in and this is where like probably my biggest estrangement and why I don't recognize science and don't trust it anymore, is the trials that flew to publication in the top journals in the world were so brazenly manipulated and corrupted in the design and conduct in, many of us wrote about it. But they flew to publication, and then every time they were published, you saw these huge PR campaigns in the media. New York Times, Boston Globe, L.A. times, ivermectin doesn't work. Latest high quality, rigorous study says. I'm sitting here in my office watching these lies just ripple throughout the media sphere based on fraudulent studies published in the top journals. And that's that's that has changed. Now that's why I say I'm estranged and I don't know what to trust anymore."

Vaccine Injuries

Carlson asked Kory about his clinical experience with vaccine injuries.

"So how this is how I divide, this is just kind of my perception of vaccine injury is that when I use the term vaccine injury, I'm usually referring to what I call a single organ problem, like pericarditis, myocarditis, stroke, something like that. An autoimmune disease," he replied.

"What I specialize in my practice, is I treat patients with what we call a long Covid long vaxx. It's the same disease, just different triggers, right? One is triggered by Covid, the other one is triggered by the spike protein from the vaccine. Much more common is long vax. The only real differences between the two conditions is that the vaccinated are, on average, sicker and more disabled than the long Covids, with some pretty prominent exceptions to that."

Watch the entire interview above, and you can support Tucker Carlson's endeavors by joining the Tucker Carlson Network here...

Tyler Durden Thu, 03/14/2024 - 16:20

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