Did a new Korean study show that the mRNA COVID-19 vaccines can cause certain autoimmune diseases?! Take a look at the viral claims, and find out what the facts really are!
Claim : Study show mRNA vaccines cause autoimmune diseases!
Some people are sharing a South Korean study by Seung-Won Jung et. al., suggesting that it shows that mRNA COVID-19 vaccines can cause certain autoimmune diseases!
McCullough Foundation : NEW STUDY – COVID-19 mRNA injections are associated with an increased risk of developing certain autoimmune diseases, including systemic lupus erythematosus, alopecia areata, psoriasis, and rheumatoid arthritis
This population-based cohort study involves 9,258,803 individuals and includes up to one year of observation time.
The authors conclude, “long-term monitoring is necessary after mRNA vaccination for the development of autoimmune connective tissue diseases (AI-CTDs).”
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Truth : Study does not show mRNA vaccines cause autoimmune diseases!
This is yet another example of anti-vaccine misinformation being propagated online, and here are the reasons why…
Fact #1 : Study does not show mRNA vaccines cause autoimmune diseases
Let me start by pointing out that you can read the entire paper by Seung-Won Jung et. al., called Long-term risk of autoimmune diseases after mRNA-based SARS-CoV2 vaccination in a Korean, nationwide, population-based cohort study.
This is a large study in which the authors compared the risk of developing certain autoimmune diseases based on historical data (for 2 years prior to mRNA vaccinations), compared to two years after mRNA vaccinations.
Despite suggestions that this study showed that mRNA vaccines for COVID-19 can cause autoimmune diseases, that’s not really the case. The authors specifically pointed this out in the abstract, right on the first page:
Overall, we conclude that mRNA-based vaccinations are not associated with an increased risk of most AI-CTDs, although further research is needed regarding its potential association with certain conditions.
They did find some signals that warrant further research, but nothing that would actually prove that mRNA vaccines cause autoimmune diseases.
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Fact #2 : Data shows mRNA vaccines reduced risk for many autoimmune diseases
The data shared in this study suggest that mRNA vaccines may increase the risk of developing two autoimmune diseases:
- systemic lupus erythematosus, and
- bullous pemphigoid
But conversely, the data also suggest that mRNA vaccines may reduce the risk of developing five autoimmune diseases:
- primary cicatricial alopecia
- psoriasis
- Behcet disease
- Crohn disease
- Rheumatoid arthritis
Does this mean that the mRNA vaccines can therefore “prevent” autoimmune diseases? Of course, not. Just because the data “appears” to show an increased or reduced risk in developing certain autoimmune diseases, that does not mean the mRNA vaccines are necessarily the reason.
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Fact #3 : COVID-19 Infection May Be A Factor
I should also point out that COVID-19 infections may be a factor in the increased risk of developing some autoimmune diseases post-vaccination. This is important as the study authors themselves pointed out that prior studies have suggested that “COVID-19 infections increase the risk of patients developing autoimmune diseases“.
It appears that they may have attempted to “fix that” by filtering out COVID-19 infections from the vaccinated cohort. However, they could only accomplish this based on reported COVID-19 diagnoses.
Therefore, it is more than plausible that a substantial number of people in the vaccinated cohort may have undiagnosed COVID-19 infections, especially since unvaccinated people do experience mild or subclinical COVID-19 infections. Such patients are often undiagnosed, as they have mild or no symptoms, and are therefore unaware that they are infected.
In short – the increased risk in vaccination people may ultimately be due to undiagnosed COVID-19 infections. Hence, the need for “more research” and not just jumping to conclusions!
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Fact #4 : Correlation Is Not Causation
It is also important to point out that just because the data appears to show some kind of correlation between mRNA vaccines and an increased risk in developing certain autoimmune diseases, it does not mean the mRNA vaccines are necessary the cause.
For example, if you get pregnant after getting an mRNA vaccination, does it mean that the vaccine made you pregnant? Of course, not. It’s the same silly argument being made with the results of this South Korean study.
How can anyone establish any “causal relationship” between the increased risk in two autoimmune diseases and the mRNA vaccines based on these results? Similarly, no one can use these results to claim that mRNA vaccines prevent five autoimmune diseases!
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Dr. Adrian Wong has been writing about tech and science since 1997, even publishing a book with Prentice Hall called Breaking Through The BIOS Barrier (ISBN 978-0131455368) while in medical school.
He continues to devote countless hours every day writing about tech, medicine and science, in his pursuit of facts in a post-truth world.
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