Berelowitz, G J, Burgess, A P, Thanabalasingham, T et al. · Journal of viral hepatitis · 1995 · DOI
This study followed 40 patients who had recovered from hepatitis A or B infection and compared them to 47 patients who recovered from other infections. Researchers found that people who had viral hepatitis reported significantly more fatigue, muscle pain, and mood changes even 6 months to 2.5 years after their liver function returned to normal. These symptoms were worse than in the comparison group, suggesting that hepatitis infection can trigger lasting fatigue and other problems even after the acute illness has passed.
This study provides epidemiological evidence that post-viral infection syndromes characterized by persistent fatigue can develop following specific viral infections with normalized laboratory markers, directly relevant to ME/CFS as a potential post-infectious condition. It validates that post-hepatitis fatigue represents a measurable, clinically distinct entity separate from active infection, supporting the biological plausibility of post-viral ME/CFS.
This study does not prove that hepatitis causes ME/CFS or establish whether the mechanisms underlying post-hepatitis fatigue are identical to ME/CFS. It cannot determine causation definitively, as it is observational; furthermore, the study does not characterize whether post-hepatitis fatigue meets operational case definitions for ME/CFS (e.g., post-exertional malaise) or examine immunological mechanisms.
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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