Interesting... unpublished data. Usually, people who are trying to scientifically unsupported concepts write a scientific-looking paper and post it on a pre-print site, since that is the only way they can get the paper out where people can see it, since it would never pass the peer-review process. This claim apparently doesn't even warrant the placement of an unpublishable article on a pre-print site.
The most I could find is this blog article COVID-19 mRNA Vaccines Reduce A Major Beneficial Bacteria, Gut Biodiversity: Research..
According to this blog, the "proof" of Covid vaccine impact on gut health is the following:
In her research, she came across a pair of siblings enrolled in the COVID-19 vaccine clinical trials.
“One sibling got a placebo, and one got the vaccine. The one sibling that got the vaccine got harmed… and she has no Bifidobacteria bacteria. Her brother, who got the placebo and was not harmed, has this Bifidobacteria,” she told The Epoch Times.
There are also rare cases where patients’ Bifidobacteria population increases. Dr. Hazan spoke about a patient’s Bifidobacteria population more than doubling a month after vaccination. However, at six to nine months postvaccination, the patient’s number of Bifidobacteria had fallen to zero.
Hmm. No one would ever call observations of three patients a "study." At most, this is a case report. And there are a lot of problems with this even as a case report. The first question I would ask is whether their test reagents/protocols are sufficient to detect gut biota by species. And then I would ask whether other factors could have been responsible the change in one species of gut flora.
As of May 2023, 81% of the population had at least one dose of Covid vaccine and 69.5% had received the primary series. The numbers are higher now, since a few months have passed. COVID-19 Vaccinations in the United States. With the majority of the population being vaccinated, it would be easy to find people who lost gut microbiome diversity. After all, they would constitute the majority of the population by now. So where are all the peer-reviewed articles in the medical literature about the problem?
(I will also point out that The Epoch Times is not and has never been a credible source of scientific information. It purports to be a conservative media outlet, but I question that, given its complicity in spreading antivax and other misinformation regarding the Covid pandemic. It is clear that such misinformation has been targeted to conservatives, and the result has been that Republicans are around 7% more likely to die from Covid than Democrats. Why would an outlet that purported supports conservative values tell conservatives propaganda that kills them?)
Oh, this little gem at the bottom of the original post says everything:
The absence of Bifidobacteria microbes is linked to chronic diseases, including diabetes, cancer, and autoimmune diseases.
Some studies have shown that the administration of probiotic Bifidobacteria can help improve diabetic conditions and help fight cancer...
Dr. Hazan is trying to sell stuff! That's what those two sentences are all about. Progenabiome - All Products.
I m so glad that you caught the very first line of that posting , specifically:
“The effect of the covid vaccine on gut microbes in the gastrointestinal tract (an unpublished medical report, therefore no peer review yet “ ) (Emphasis mine)
Was it just such an observation that brought about Pasteur's invention of pasteurization and the further study of microbes ?
Was it just such an observation that Marie Curie discovered both radioactivity and the radioactive elements of polonium and radium ?
An observation nothing more than an invitation to further inquiry, in this case, a medical inquiry into whether or not the covid vaccine impacts on the human gut biome
The purpose of this post was to provide general information about the covid vaccine, and not to 'nit pick' the observation of a supposedly 'safe and effective' biologic injection,
which replaces the human natural immune system.
The human intestinal-gut biome system is a significant part of that immune system which protects us and which remains yet to be investigated.
There is no “Proof” of Covid vaccine impact on gut health, only an observation of that appears to be a corellation
which begs to be medically and gastro-intestinal further studied .
Furthermore, I didn't relize that “Dr. Hazan is trying to sell stuff! “ and had written this report, which credit is given to the author Marina Zhang .