E3 PreliminaryPreliminaryPEM ?Peer-reviewedMachine draft
Myalgic Encephalomyelitis/Chronic Fatigue Syndrome: First Described Complication after Gam-COVID-Vac Vaccine.
Manysheva, Ksenia, Sherman, Mikhail, Zhukova, Natalia et al. · Psychiatria Danubina · 2022
Quick Summary
This report describes one case of a 25-year-old woman who developed ME/CFS symptoms about 10 days after receiving the Sputnik V COVID-19 vaccine. She experienced severe fatigue, muscle pain, and difficulty moving. This is the first documented case linking ME/CFS to this particular vaccine, though it remains unclear whether the vaccine caused the condition or if it occurred by coincidence.
Why It Matters
Post-viral and post-vaccination complications are important areas of investigation for ME/CFS, as understanding potential triggers may help identify underlying disease mechanisms and inform patient care strategies. This report contributes to the evolving discussion about adverse events following vaccines and calls attention to the need for systematic surveillance of ME/CFS development in vaccinated populations.
Observed Findings
- ME/CFS symptoms developed approximately 10 days after Gam-COVID-Vac vaccination
- Patient presented with severe myalgia and severe locomotor dysfunction
- Symptom presentation was consistent with established ME/CFS diagnostic criteria including fatigue, cognitive dysfunction, sleep disturbance, and autonomic dysfunction
- This was documented as the first reported case of ME/CFS following this specific vaccine
Inferred Conclusions
- The temporal relationship between vaccination and symptom onset suggested a potential association
- The authors concluded this represents a previously undocumented complication of Gam-COVID-Vac vaccine
- The severe presentation warranted clinical attention and documentation of this adverse event
Remaining Questions
- What is the actual incidence of ME/CFS in vaccinated versus unvaccinated populations?
- What biological mechanisms, if any, might link vaccine administration to ME/CFS development?
- Did this patient have pre-existing risk factors or genetic predispositions that increased vulnerability?
- What was the long-term clinical course and outcomes for this patient?
What This Study Does Not Prove
This single case report does not prove that Sputnik V vaccine causes ME/CFS. Temporal association does not establish causation, and without population-level data, comparative analysis, or mechanistic studies, it cannot rule out coincidental timing or other triggering factors. Systematic case reports and epidemiological studies would be needed to determine if ME/CFS occurs at higher rates in vaccinated versus unvaccinated populations.
Tags
Symptom:Cognitive DysfunctionUnrefreshing SleepPainFatigue
Phenotype:Severe
Method Flag:PEM Not DefinedWeak Case DefinitionNo ControlsSmall SampleExploratory Only
Metadata
- PMID
- 36170726
- Review status
- Machine draft
- Evidence level
- Early hypothesis, preprint, editorial, or weak support
- Last updated
- 8 April 2026