Yong, Shin Jie, Kenny, Tiff-Annie, Halim, Alice et al. · Reviews in medical virology · 2025 · DOI
This review describes a condition called post-COVID-19 vaccination syndrome (PCVS), where some people develop long-lasting symptoms similar to long COVID after receiving a vaccine. Symptoms typically start within days to weeks after vaccination and can last for months or years, including fatigue, brain fog, and nerve tingling. The study examines what might cause PCVS and discusses possible treatments, though researchers emphasize that much remains unknown about this condition.
This review is important because it examines the overlap between post-vaccination symptoms and ME/CFS, helping clinicians recognize and potentially treat affected patients. For ME/CFS researchers, understanding vaccine-related symptom onset and pathophysiology may provide insights into broader mechanisms of chronic fatigue conditions. The review also highlights the need for rigorous research to distinguish genuine adverse effects from coincidental illness.
This narrative review does not establish the actual prevalence or incidence of PCVS, nor does it prove causation between vaccination and symptom onset—temporal association alone does not confirm causality. The reliance on case reports and observational studies means findings cannot be generalized to broader populations, and the review does not compare the frequency of PCVS symptoms against background rates in unvaccinated populations.
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
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