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Ther Adv Infect Dis. 2021 Apr 20;8:20499361211009385. doi: 10.1177/20499361211009385. eCollection 2021.

COVID-19 and post-infectious myalgic encephalomyelitis/chronic fatigue syndrome: a narrative review.

Therapeutic advances in infectious disease

Sonia Poenaru, Sara J Abdallah, Vicente Corrales-Medina, Juthaporn Cowan

Affiliations

  1. Department of Medicine, The Ottawa Hospital, General Campus, 501 Smyth Road, Box 206, Ottawa, Ontario, K1H 8L6, Canada.
  2. Clinical Epidemiology Program, The Ottawa Hospital Research Institute, Ottawa, Ontario, Canada.

PMID: 33959278 PMCID: PMC8060761 DOI: 10.1177/20499361211009385

Abstract

Coronavirus disease 2019 (COVID-19) is a viral infection which can cause a variety of respiratory, gastrointestinal, and vascular symptoms. The acute illness phase generally lasts no more than 2-3 weeks. However, there is increasing evidence that a proportion of COVID-19 patients experience a prolonged convalescence and continue to have symptoms lasting several months after the initial infection. A variety of chronic symptoms have been reported including fatigue, dyspnea, myalgia, exercise intolerance, sleep disturbances, difficulty concentrating, anxiety, fever, headache, malaise, and vertigo. These symptoms are similar to those seen in myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS), a chronic multi-system illness characterized by profound fatigue, sleep disturbances, neurocognitive changes, orthostatic intolerance, and post-exertional malaise. ME/CFS symptoms are exacerbated by exercise or stress and occur in the absence of any significant clinical or laboratory findings. The pathology of ME/CFS is not known: it is thought to be multifactorial, resulting from the dysregulation of multiple systems in response to a particular trigger. Although not exclusively considered a post-infectious entity, ME/CFS has been associated with several infectious agents including Epstein-Barr Virus, Q fever, influenza, and other coronaviruses. There are important similarities between post-acute COVID-19 symptoms and ME/CFS. However, there is currently insufficient evidence to establish COVID-19 as an infectious trigger for ME/CFS. Further research is required to determine the natural history of this condition, as well as to define risk factors, prevalence, and possible interventional strategies.

© The Author(s), 2021.

Keywords: COVID-19; chronic fatigue syndrome; human coronavirus; myalgic encephalomyelitis; post-infectious fatigue; review

Conflict of interest statement

Conflict of interest statement: The authors declare that there is no conflict of interest.

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