Fact Check: the covid vaccine had side effects that are persistent

Fact Check: the covid vaccine had side effects that are persistent

Published May 27, 2025
±
VERDICT
Partially True

# The Claim: "The COVID vaccine had side effects that are persistent" ## Introduction The assertion that COVID-19 vaccines can lead to persistent sid...

The Claim: "The COVID vaccine had side effects that are persistent"

Introduction

The assertion that COVID-19 vaccines can lead to persistent side effects has gained traction, particularly among those concerned about vaccine safety. This claim suggests that a subset of individuals may experience long-lasting health issues following vaccination. Various studies and reports have emerged, indicating potential chronic symptoms, but the extent and nature of these side effects remain subjects of ongoing research and debate.

What We Know

  1. Long-Term Adverse Events: A study published in the journal Vaccine emphasizes the importance of continuous monitoring of COVID-19 vaccine side effects, noting that while most side effects are temporary, some individuals report ongoing symptoms. The study advocates for ongoing research to track these adverse events over time 1.

  2. Post-Vaccination Syndrome (PVS): Research from Yale University has identified a condition termed post-vaccination syndrome, where individuals report chronic symptoms such as fatigue, brain fog, and exercise intolerance following vaccination. This condition is not yet fully understood and remains unrecognized by many in the medical community 36.

  3. Rare Complications: Some studies have highlighted rare but serious side effects associated with COVID-19 vaccines, including myocarditis and thrombosis. A report from the American Association for the Advancement of Science (AAAS) discusses a potential link between vaccines and symptoms resembling Long COVID, although the connection is still unclear 5.

  4. Immune Response: A study published in Nature discusses how the immune response to vaccination may contribute to persistent symptoms in a small percentage of individuals. The presence of persistent spike proteins has been suggested as a possible factor 410.

  5. Overall Safety Profile: Despite concerns about persistent side effects, large-scale studies have generally confirmed that the benefits of COVID-19 vaccination outweigh the risks. A comprehensive analysis involving over 99 million vaccinated individuals found that while rare side effects exist, they are consistent with known vaccine reactions 8.

Analysis

The claim regarding persistent side effects from COVID-19 vaccines is supported by a mix of anecdotal reports and emerging research, but it is essential to approach this information with caution.

  • Source Reliability: The studies cited, particularly those from peer-reviewed journals like Vaccine and Nature, provide a scientific basis for understanding vaccine side effects. However, the research on post-vaccination syndrome is still in its infancy, and further studies are needed to establish causality and prevalence.

  • Bias and Conflicts of Interest: Some sources, such as news articles and opinion pieces, may exhibit bias, particularly if they emphasize sensational aspects of vaccine side effects without providing a balanced view of the overall safety profile. For instance, media outlets may focus on alarming findings without sufficient context regarding the rarity of severe side effects.

  • Methodological Concerns: Many studies rely on self-reported data, which can introduce bias and inaccuracies. The lack of standardized diagnostic criteria for conditions like PVS complicates the interpretation of findings. More rigorous, controlled studies are necessary to validate claims about persistent side effects.

  • Contradicting Evidence: While some studies suggest the possibility of long-term side effects, others emphasize the overall safety of vaccines and the importance of vaccination in preventing severe illness. This dichotomy highlights the need for ongoing research and transparent communication about vaccine risks and benefits.

Conclusion

Verdict: Partially True

The claim that COVID-19 vaccines can lead to persistent side effects is partially true. Evidence from various studies indicates that while most side effects are temporary, a subset of individuals may experience ongoing symptoms, such as fatigue and brain fog, which are associated with conditions like post-vaccination syndrome. However, the prevalence and causality of these persistent side effects remain unclear, and further research is necessary to fully understand their implications.

It is important to note that while some studies highlight potential long-term effects, the overall safety profile of COVID-19 vaccines is supported by large-scale analyses that demonstrate the benefits of vaccination outweigh the risks. The current body of evidence includes limitations, such as reliance on self-reported data and the need for standardized diagnostic criteria, which complicate the interpretation of findings.

Readers are encouraged to critically evaluate information regarding vaccine safety and to consider the broader context of vaccine efficacy and public health recommendations. Ongoing research will be crucial in clarifying the relationship between COVID-19 vaccines and any potential long-term side effects.

Sources

  1. Long-term adverse events of three COVID-19 vaccines as reported by ... (https://pmc.ncbi.nlm.nih.gov/articles/PMC9009903/)
  2. COVID-19 Vaccine Side Effects and Long-Term Neutralizing ... - PubMed (https://pubmed.ncbi.nlm.nih.gov/38857503/)
  3. Immune markers of post-vaccination syndrome indicate future research ... (https://news.yale.edu/2025/02/19/immune-markers-post-vaccination-syndrome-indicate-future-research-directions)
  4. Persistence in risk and effect of COVID-19 vaccination on long-term ... (https://www.nature.com/articles/s41467-024-45953-1)
  5. Rare link between coronavirus vaccines and Long Covid-like ... - AAAS (https://www.science.org/content/article/rare-link-between-coronavirus-vaccines-and-long-covid-illness-starts-gain-acceptance)
  6. Yale study reports chronic symptoms after Covid vaccine. (https://connect.mayoclinic.org/discussion/yale-study-reports-chronic-symptoms-after-covid-vaccine/)
  7. Scientists find clues on why COVID vaccine causes chronic health ... (https://www.foxnews.com/health/scientists-find-clues-covid-vaccine-causes-chronic-health-problems)
  8. Study Largely Confirms Known, Rare COVID-19 Vaccine Side Effects (https://www.factcheck.org/2024/02/study-largely-confirms-known-rare-covid-19-vaccine-side-effects/)
  9. Yale study explores chronic symptoms after COVID-19 shots, finds ... (https://www.msn.com/en-in/health/health-news/yale-study-explores-chronic-symptoms-after-covid-19-shots-finds-alarming-shifts-in-immune-system/ar-AA1zvhag)
  10. Why COVID Vaccine Causes Chronic Health Issues In Some: Scientists Find ... (https://www.ndtv.com/science/study-reveals-potential-causes-of-long-term-health-issues-after-covid-vaccination-7790904)

Have a claim you want to verify? It's 100% Free!

Our AI-powered fact-checker analyzes claims against thousands of reliable sources and provides evidence-based verdicts in seconds. Completely free with no registration required.

💡 Try:
"Coffee helps you live longer"
100% Free
No Registration
Instant Results

Comments

Leave a comment

Loading comments...

More Fact Checks to Explore

Discover similar claims and stay informed with these related fact-checks

Fact Check: How many lives did Covid vaccine save worldwide
Partially True
🎯 Similar

Fact Check: How many lives did Covid vaccine save worldwide

Detailed fact-check analysis of: How many lives did Covid vaccine save worldwide

Aug 7, 2025
Read more →
Fact Check: Transcript
00:00
Don't ever forget every news
media outlet was telling you if
you was unvaccinated in 2021 to
go ahead pick your barrier plot
get you a good ass casket and
set your suit up. Cuz you
going todie. Not going to
you're not going to get COVID
if you have these vaccinations.
His drug maker Pfizer just
announcing the results of its
vaccine trial for adolescents.
It says its coronavirus shot
was 1 00 percent effective at
preventing infection and
sickness among 12 to 15 year
00:30
olds. That's what the fucking
message was in twenty twenty-1.
Never forget that shit. Now in
2025 they say COVID vaccine
heart risk warning. Update
issues by FDA. I guess it's
time to stop listening to these
stupid motherfuckers. They
obviously don't know what the
fuck they talking about.
Partially True
🎯 Similar

Fact Check: Transcript 00:00 Don't ever forget every news media outlet was telling you if you was unvaccinated in 2021 to go ahead pick your barrier plot get you a good ass casket and set your suit up. Cuz you going todie. Not going to you're not going to get COVID if you have these vaccinations. His drug maker Pfizer just announcing the results of its vaccine trial for adolescents. It says its coronavirus shot was 1 00 percent effective at preventing infection and sickness among 12 to 15 year 00:30 olds. That's what the fucking message was in twenty twenty-1. Never forget that shit. Now in 2025 they say COVID vaccine heart risk warning. Update issues by FDA. I guess it's time to stop listening to these stupid motherfuckers. They obviously don't know what the fuck they talking about.

Detailed fact-check analysis of: Transcript 00:00 Don't ever forget every news media outlet was telling you if you was unvaccinated in 2021 to go ahead pick your barrier plot get you a good ass casket and set your suit up. Cuz you going todie. Not going to you're not going to get COVID if you have these vaccinations. His drug maker Pfizer just announcing the results of its vaccine trial for adolescents. It says its coronavirus shot was 1 00 percent effective at preventing infection and sickness among 12 to 15 year 00:30 olds. That's what the fucking message was in twenty twenty-1. Never forget that shit. Now in 2025 they say COVID vaccine heart risk warning. Update issues by FDA. I guess it's time to stop listening to these stupid motherfuckers. They obviously don't know what the fuck they talking about.

Jul 21, 2025
Read more →
Fact Check: The covid-19 vaccine is deadlier than others.
False
🎯 Similar

Fact Check: The covid-19 vaccine is deadlier than others.

Detailed fact-check analysis of: The covid-19 vaccine is deadlier than others.

Aug 3, 2025
Read more →
Fact Check: "RFK Jr. has officially REMOVED the COVID shot from the childhood vaccine schedule
True

Fact Check: "RFK Jr. has officially REMOVED the COVID shot from the childhood vaccine schedule

Detailed fact-check analysis of: "RFK Jr. has officially REMOVED the COVID shot from the childhood vaccine schedule

Aug 2, 2025
Read more →
Fact Check: Obama became president illegally because he was born in Kenya.

The Bush family is involved in the New World Order (NWO).

Hillary Clinton was passed over by the Vatican for the presidency because people care more about race than character.

The Vatican is described as "Satan's earthly HQ" and supposedly orchestrates various political events.

Trump was anti-Illuminati, fought a stolen election, and was targeted by a coup and various conspiracies.

The COVID-19 mRNA vaccine is framed as part of a satanic/globalist plan (NWO).

Jesus gave Trump two terms because of what the Vatican did on 9/11.
False

Fact Check: Obama became president illegally because he was born in Kenya. The Bush family is involved in the New World Order (NWO). Hillary Clinton was passed over by the Vatican for the presidency because people care more about race than character. The Vatican is described as "Satan's earthly HQ" and supposedly orchestrates various political events. Trump was anti-Illuminati, fought a stolen election, and was targeted by a coup and various conspiracies. The COVID-19 mRNA vaccine is framed as part of a satanic/globalist plan (NWO). Jesus gave Trump two terms because of what the Vatican did on 9/11.

Detailed fact-check analysis of: Obama became president illegally because he was born in Kenya. The Bush family is involved in the New World Order (NWO). Hillary Clinton was passed over by the Vatican for the presidency because people care more about race than character. The Vatican is described as "Satan's earthly HQ" and supposedly orchestrates various political events. Trump was anti-Illuminati, fought a stolen election, and was targeted by a coup and various conspiracies. The COVID-19 mRNA vaccine is framed as part of a satanic/globalist plan (NWO). Jesus gave Trump two terms because of what the Vatican did on 9/11.

Jul 28, 2025
Read more →
Fact Check:  Johnson & Johnson Lead Scientist Confesses. J&J COVID-19 Vaccine Was 'Not Safe and Effective, Reveals "Lack of Research" From Rushing to Release Vaccine: "People Wanted It, We Gave It to Them"...
False

Fact Check: Johnson & Johnson Lead Scientist Confesses. J&J COVID-19 Vaccine Was 'Not Safe and Effective, Reveals "Lack of Research" From Rushing to Release Vaccine: "People Wanted It, We Gave It to Them"...

Detailed fact-check analysis of: Johnson & Johnson Lead Scientist Confesses. J&J COVID-19 Vaccine Was 'Not Safe and Effective, Reveals "Lack of Research" From Rushing to Release Vaccine: "People Wanted It, We Gave It to Them"...

Jul 26, 2025
Read more →