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    Correcting this week’s misinformation: week of January 15, 2026

    Were rotavirus vaccines removed due to danger?

    The Claim:

    In a CBS News interview, RFK Jr. claims that the rotavirus vaccine stops very few deaths but may cause serious harm, like dangerous bowel problems, because millions of shots are given to prevent about one death a year

    The Facts:

    In the interview, RFK Jr. says that rotavirus used to kill about 3 children each year. But information from the CDC pink book shows a very different picture. Before the rotavirus vaccine was used, rotavirus caused:

    • About 410,000 doctor visits each year
    • More than 200,000 emergency room visits
    • Between 55,000 and 70,000 hospital stays
    • About 20 to 60 deaths every year in children under age 5

    Since then, the rotavirus vaccine has become available, even though not all children get it. It now prevents about 40,000 to 50,000 hospital stays each year in babies and young children in the United States.

    RFK Jr. also says that some rotavirus vaccines were linked to serious and deadly problems, including a condition called intussusception. This is a serious condition where part of the intestine slides into another part, like a telescope folding in on itself. This can block food from passing through and cut off blood flow, which can be life-threatening if not treated quickly.

    He says one vaccine was taken off the market because of this condition. That part is true. One early rotavirus vaccine was stopped after doctors found that intussusception happened in about 1 out of every 10,000 to 30,000 doses.

    These facts show two important things: first, that vaccine safety monitoring works, and second, that safety is taken seriously. The rotavirus vaccines used today have been given to millions of children and have not been shown to increase the risk of intussusception.

    Are unvaccinated children better off?

    The Claim:

    In an appearance on the Katie Miller podcast, Jenny McCarthy claims that children who are not vaccinated are healthier, get sick less often, and have stronger immune systems than vaccinated children, based on personal stories and an alleged hidden study

    The Facts:

    This interview is based on a paper that claims to have discovered an ‘off-switch’ for mRNA COVID-19 vaccines. In it, Dr. McCullough says that one solution to “detox” against mRNA vaccines is to introduce small interfering RNA (siRNA), similar to mRNA along with ribonuclease targeting chimeras (RIBOTACs)

    McCullough has made multiple claims, including in his paper below, that lipid nanoparticles (LNPs) can cause injury and harm. Yet in his new procedure, both siRNA and RIBOTACs use lipid nanoparticles to enter the cells to target mRNA. If using lipids to allow siRNA and RIBOTACs to enter our cells is seen as safe, we can also assume the mRNA from vaccination is safe.

    McCullough thinks this procedure is necessary because of worries about how mRNA vaccines spread throughout the body.

    His idea about “systemic biodistribution” comes from misconstrued data. A study in rats looked at lipid nanoparticles after mRNA vaccine injections and their distribution in organs over time. The data show that most of the nanoparticles stayed where they were injected, and some went to the liver. In the ovaries, the highest amount of nanoparticles found was very, very small (only about 0.095% after 48 hours). This amount might be even smaller in human ovaries because the dose used in the COVID vaccine is much less than what they used in the rat study.

    Would this off-switch work? We doubt Dr. McCullough’s science very much, and it is unnecessary because while tiny amounts of mRNA may persist in the body, the vast majority usually degrades within days.

    Are COVID vaccines messing with our genomics?

    The Claim:

    In an interview with Tucker Carlson, Peter McCullough presents a study that he says shows mRNA vaccines integrate with people’s genes and change them.

    The Facts:

    What McCullough showed was a case study, which means it looked at what happened to just one person. It was published in a journal that may not carefully check research. This kind of study does not show that mRNA vaccines mix with DNA or change people’s genes.

    There is also a serious conflict of interest. The study was paid for by Neo7Bioscience, a private biotech company. The main researcher on the study is also the company’s CEO. This makes the results less trustworthy.

    So what did the study actually find? The researchers found one short stretch of 20 “letters” in the woman’s DNA that matched part of the spike protein code from Pfizer’s vaccine reference. But the woman only received Moderna vaccines, not Pfizer.

    Human DNA has billions of base pairs, so finding a match with 20 letters like this can happen by chance. It could also be caused by contamination, meaning outside genetic material may have accidentally mixed into the sample.

    Until other independent labs repeat this work under strict rules and get the same results, this finding is only a possible coincidence. There is no proof that vaccine material entered the DNA or that it caused this woman’s cancer.

    Disclaimer: Science is always evolving and our understanding of these topics may have evolved too since this was originally posted. Be sure to check out our most recent posts and browse the latest Just the Facts Topics for the latest.

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