Lofrano-Porto, Adriana, D'Isabel, Susanne, Smith, Denise L · Frontiers in medicine · 2024 · DOI
This article reviews what we know about long COVID fatigue, especially in firefighters and other public safety workers. The authors explain why fatigue after COVID is so hard to diagnose and treat, since patients often look healthy on the outside even though they feel extremely tired. They describe possible biological reasons for this fatigue and discuss why it matters for workers whose jobs require them to be physically and mentally alert.
This review addresses a critical gap in understanding long COVID fatigue for patients and clinicians: the mismatch between severe symptoms and normal test results, which often leaves patients feeling invalidated. By providing a framework for understanding the pathology underlying post-COVID fatigue and recognizing its real occupational impacts, this work may improve diagnostic recognition and guide better treatment approaches.
This is a review article, not a primary research study, so it does not present original experimental data or clinical trials. It cannot prove causation or establish new epidemiological associations—it synthesizes existing literature and proposes a conceptual framework. The focus on firefighters is illustrative rather than based on systematic analysis of long COVID prevalence in this occupational group.
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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