Question explored with the scientific record
Are the chances of contracting MS as a result of the MRNA covid vaccine zero?
The chance of developing multiple sclerosis from an mRNA COVID-19 vaccine is not zero, but the evidence retrieved does not contain a single case report or study linking the two.
The records you provided cover myocarditis, anaphylaxis, antiphospholipid syndrome, and shingles reactivation after mRNA COVID-19 vaccination [1, 2, 3, 4, 5, 6, 7]. None of them mention multiple sclerosis as an outcome. One record from 1993 discusses TNF-alpha and ICAM-1 in immune-mediated demyelination generally [8], and another from 2010 looks at VZV in MS patients [9], but neither is about the COVID-19 vaccine.
The absence of a documented case in this retrieval does not mean the risk is zero. It means the question was not studied in the papers that came back. A plausible mechanism exists: the spike protein or the vaccine's adjuvant effect could, in theory, trigger an autoimmune cascade against myelin in a susceptible person, similar to how other immune challenges can unmask MS. But the evidence here provides no data to support that specific link.
My call: the risk is not proven to be zero, but this retrieval found no evidence of any cases. Confidence: low, because the retrieval did not search for this specific outcome.
Sources used 9
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Booster dose of COVID-19 mRNA vaccine does not increase risks of myocarditis and pericarditis compared with primary vaccination: New insights from the vaccine adverse event reporting system
Booster COVID-19 mRNA vaccination was associated with lower incidence and reporting risk of myocarditis/pericarditis compared with primary series, based on US VAERS and CDC COVID Data Tracker data from December 2020 to March 2022.
DOI: 10.3389/fimmu.2022.938322 -
Case of Covid Mrna Vaccine Linked Antiphospholipid Syndrome
This case report presents a 22-year-old male who developed antiphospholipid syndrome and a large pulmonary embolus following COVID mRNA vaccination, suggesting a potential autoimmune reaction linked to the vaccine.
DOI: 10.33140/ijdmd.07.01.07 -
Biphasic anaphylaxis after exposure to the first dose of Pfizer‐BioNTech COVID‐19 mRNA vaccine
A 30-year-old male with prior allergies developed an initial allergic reaction after the first Pfizer-BioNTech COVID-19 vaccine dose and a recurrent biphasic anaphylactic reaction on Day 3, treated with epinephrine and corticosteroids.
DOI: 10.1002/jmv.27109 -
Myocarditis With COVID-19 mRNA Vaccines
This narrative review characterizes myocarditis/pericarditis as a rare complication of COVID-19 mRNA vaccination, particularly in young males after the second dose, with a generally self-limited course and a favorable overall benefit-risk balance supporting universal vaccination.
DOI: 10.1161/circulationaha.121.056135 -
Case report: Five patients with myocarditis after mRNA COVID-19 vaccination
This case series of five adolescent males describes probable myocarditis after mRNA COVID-19 vaccination, with chest pain in all, ST elevation in all, troponin I increase in all but one, and full recovery.
DOI: 10.3389/fped.2022.977476 -
A Case of COVID mRNA Vaccine Linked Antiphospholipid Syndrome
A 22-year-old healthy male developed antiphospholipid syndrome with a large pulmonary embolus, markedly elevated triple-positive antiphospholipid antibodies, and multisystem symptoms after his second dose of an mRNA COVID vaccine, with negative COVID testing, and improved on api…
DOI: 10.33140/bscr.02.01.13 -
Herpes Zoster Reactivation Following COVID-19 mRNA Vaccination in an Elderly Patient: A Case Report
An 82-year-old Indonesian woman developed herpes zoster reactivation 10 days after receiving the first dose of the Pfizer-BioNTech COVID-19 mRNA vaccine, with PCR-confirmed VZV, and her lesions resolved with valacyclovir treatment.
DOI: 10.7454/jdvi.v9i1.1196 -
Immune‐mediated demyelination
This study reviews the role of tumor necrosis factor-alpha (TNF-a) and intercellular adhesion molecule-1 (ICAM-1) in the pathogenesis of immune-mediated demyelination disorders such as Guillain-Barré syndrome (GBS) and multiple sclerosis (MS), highlighting their potential as the…
DOI: 10.1002/ana.410330602 -
Varicella zoster virus in progressive forms of multiple sclerosis
This study investigates the presence of varicella zoster virus (VZV) in cerebrospinal fluid and blood lymphocytes of patients with progressive forms of multiple sclerosis, finding VZV DNA in 65% of cases and suggesting a potential association with chronic infection or immune-med…
DOI: 10.1016/j.clineuro.2010.04.018