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ME/CFS Atlas — A public knowledge atlas for ME/CFS

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ME/CFS Atlas is an evidence reference platform, not a medical provider. Content is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.

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ME/CFS Evidence Browser — Classified Studies on Myalgic Encephalomyelitis

Evidence browser

Search and filter 6,206 studies by evidence level, diagnostic criteria, PEM status, and research domain. Each entry links to the original source.

Studies sorted by evidence level, then year. Browse by topic instead →

Evidence level (E0–E3) reflects study type and replication, not methodological quality. A weak systematic review still sits at E0. How evidence levels work →

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1205 studies

E0 — Consensus655E1 — Replicated321E2 — Moderate2,807E3 — Preliminary2,423

ME/CFS4,041Long COVID224Post-infectious190Overlapping1,064

Required for diagnosis417Not specified / unclear2,252Not required3,537

Post-Exertional Malaise1,082Cognitive Dysfunction1,750Pain1,629Unrefreshing Sleep805Orthostatic Intolerance484

Cytokines821Gene Expression573Metabolomics478Neuroimaging472Autoantibodies460

Infection-Triggered1,182Long COVID Overlap604Pediatric496Severe232

Strong Phenotyping445Sex-Stratified330Severe ME Included119

Systematic Review272Meta-Analysis61RCT301

Peer-reviewed6,149Preprint3Unclear54

1121–1140 of 1,205 studies

E3 PreliminaryCohortPEM unclearCase-Control

A cluster of cases of chronic fatigue and chronic fatigue syndrome: clinical and immunologic studies.

Levine, P H, Dale, J K, Benson-Grigg, E et al.·Clinical infectious diseases : an official publication of the Infectious Diseases Society of America·1996

This study examined a group of people who developed chronic fatigue syndrome (ME/CFS), looking at their medical histories and immune system patterns to understand what might have caused their illness. Researchers compared patients with ME/CFS to control groups and measured various immune markers in their blood. The goal was to identify common features that might explain why these individuals became ill.

E3 PreliminaryMechanismPEM not requiredCross-Sectional

Autoantibodies to nuclear envelope antigens in chronic fatigue syndrome.

Konstantinov, K, von Mikecz, A, Buchwald, D et al.·The Journal of clinical investigation·1996

Researchers found that about half of ME/CFS patients had antibodies (immune proteins) in their blood that attack a protein called lamin B1 found in the nucleus of cells. This suggests that ME/CFS may involve the immune system mistakenly attacking the body's own cells. This discovery provides evidence that autoimmunity—when the body's defense system malfunctions—may play a role in ME/CFS.

E3 PreliminaryCommentaryPEM not requiredEditorial

The use of transfer factors in chronic fatigue syndrome: prospects and problems.

Levine, P H·Biotherapy (Dordrecht, Netherlands)·1996

ME/CFS often starts with a viral infection and some people have ongoing herpes virus activity. This article discusses transfer factors—a type of immune therapy—that might help fight these viruses and improve symptoms. The authors explain why we need better-designed studies to test if this treatment actually works.

E3 PreliminaryCohortPEM not requiredCase-Control

Use of anti HHV-6 transfer factor for the treatment of two patients with chronic fatigue syndrome (CFS). Two case reports.

Ablashi, D V, Levine, P H, De Vinci, C et al.·Biotherapy (Dordrecht, Netherlands)·1996

This small study tested whether a special immune treatment called transfer factor, designed to target HHV-6 (a virus that may be active in some ME/CFS patients), could help. Two ME/CFS patients with active HHV-6 infection received this treatment. One patient improved significantly and returned to normal activities within weeks, but the other patient saw no improvement. The results suggest this treatment might help control HHV-6 in some patients, but more research is needed.

E3 PreliminaryReviewPEM unclearReview-Narrative

Viral arthritis.

Schnitzer, T J, Penmetcha, M·Current opinion in rheumatology·1996

This review examines how viral infections can cause joint pain and arthritis. Researchers found that several viruses—including hepatitis C, parvovirus B19, and those in certain vaccines—may trigger arthritis in some people. Interestingly, the study noted a negative association between parvovirus B19 and chronic fatigue syndrome, suggesting these conditions may not be closely linked.

E3 PreliminaryDiagnosticPEM not requiredMethods-Paper

Development and application of HHV-6 antigen capture assay for the detection of HHV-6 infections.

Marsh, S, Kaplan, M, Asano, Y et al.·Journal of virological methods·1996

Researchers developed a new laboratory test to detect HHV-6, a common virus, in blood and body fluids. This test is faster, cheaper, and easier to use than older methods, and works reliably in clinical settings. They tested it on samples from healthy people, children with fever rashes, and patients with various conditions including chronic fatigue syndrome.

E3 PreliminaryReviewPEM unclearReview-Narrative

[Pathogenicity of fungi in the intestines--current status of the discussion].

Scheurlen, M·Fortschritte der Medizin·1996

Some people believe that yeast infections in the gut, particularly from a fungus called Candida, might cause chronic fatigue syndrome and other long-term illnesses by producing harmful toxins. However, experts disagree about whether this theory is actually true. This editorial explains that while the idea is interesting, there isn't enough solid scientific evidence yet to prove it works or to recommend yeast-fighting treatments based on this theory alone.

Gut MicrobiomeImmune System

E3 PreliminaryReviewPEM not requiredReview-Narrative

[Chronic fatigue syndrome--psychiatric aspects].

Lemke, M R·Fortschritte der Neurologie-Psychiatrie·1996

This editorial discusses how ME/CFS involves both physical symptoms and mental health aspects that need to be understood together. The authors explain that while doctors have focused heavily on physical symptoms, psychiatric factors—such as stress, sleep problems, and how the body's stress system works—play an important role in the syndrome. An effective approach to ME/CFS requires doctors from different specialties to work together.

SleepImmune System

E3 PreliminaryReviewPEM unclearReview-Narrative

Infectious agents and immunological disturbances in relation to chronic fatigue syndrome.

Tripathy, B K, Agarwal, A K, Sangla, K S et al.·The Journal of the Association of Physicians of India·1996

This review article examines the connection between infections and immune system problems in ME/CFS. The authors looked at existing research to understand whether certain germs or viruses might trigger the condition, and how the immune system behaves differently in people with ME/CFS compared to healthy individuals.

E3 PreliminaryReviewPEM unclearReview-Narrative

Neuroimmune mechanisms in health and disease: 2. Disease.

Anisman, H, Baines, M G, Berczi, I et al.·CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne·1996

When your body fights an infection, your immune system releases chemical messengers called cytokines that trigger fatigue, fever, loss of appetite, and inactivity—changes controlled partly by your brain and nervous system. This review explains how problems in the communication between your immune system and brain (particularly an area called the hypothalamus-pituitary-adrenal axis) may contribute to chronic conditions including ME/CFS, fibromyalgia, and autoimmune diseases. Understanding these connections could lead to new treatments using hormones and other brain-signaling molecules.

E3 PreliminaryReviewPEM not requiredReview-Narrative

Neurobiology of chronic fatigue syndrome.

Gonzalez, M B, Cousins, J C, Doraiswamy, P M·Progress in neuro-psychopharmacology & biological psychiatry·1996

This review article examines what happens in the brain and nervous system of people with ME/CFS. Researchers found that ME/CFS involves real biological changes in the brain—not just fatigue—including problems with mood, thinking, and hormone regulation. The study suggests that ME/CFS is a neurological condition with measurable differences in brain function, rather than purely psychological.

E3 PreliminaryReviewPEM not requiredReview-Narrative

Use of exercise for treatment of chronic fatigue syndrome.

McCully, K K, Sisto, S A, Natelson, B H·Sports medicine (Auckland, N.Z.)·1996

This review looks at whether exercise can help people with ME/CFS feel better. While patients often report getting much sicker after even light activity, most studies find their muscles work normally on standard tests. The authors suggest exercise training might help, but caution that avoiding 'relapses' (crashes) is critical, and more research is needed to understand how exercise affects this illness.

Immune SystemPost-Exertional Malaise

E3 PreliminaryCohortPEM not required

The value of the dehydroepiandrosterone-annexed vitamin C infusion treatment in the clinical control of chronic fatigue syndrome (CFS). I. A Pilot study of the new vitamin C infusion treatment with a volunteer CFS patient.

Kodama, M, Kodama, T, Murakami, M·In vivo (Athens, Greece)·1996

This pilot study tested whether high-dose vitamin C infusions, combined with a hormone called DHEA, could help one male ME/CFS patient who also had pneumonia-like symptoms. The patient received different types of infusions over 10 months, and his pneumonia-related symptoms improved when the new DHEA-enhanced vitamin C treatment was used alongside antibiotics. The researchers measured increased levels of certain hormones in his urine after treatment.

E3 PreliminaryReviewPEM unclearReview-Narrative

Neuroimmune and neuropsychiatric aspects of chronic fatigue syndrome.

Krupp, L B, Pollina, D·Advances in neuroimmunology·1996

This review examined how the immune system and nervous system may both contribute to ME/CFS symptoms. The authors looked at evidence that ME/CFS involves both brain-based changes and immune system dysfunction, which could explain why patients experience fatigue, cognitive problems, and mood changes.

E3 PreliminaryCohortPEM not requiredCase-Control

Epstein-Barr virus-related primary cutaneous amyloidosis. Successful treatment with acyclovir and interferon-alpha.

Drago, F, Ranieri, E, Pastorino, A et al.·The British journal of dermatology·1996

This case report describes a woman with ME/CFS who developed unusual skin lesions (brownish patches and bumps) on her chest and back for 10 years. Doctors found that the Epstein-Barr virus (EBV)—the virus that causes mononucleosis—was active in her skin and other body areas, and abnormal protein deposits were building up in her skin. When she was treated with antiviral medication (acyclovir) and a type of immune-boosting therapy (interferon-alpha), both her skin lesions and other symptoms improved significantly.

E3 PreliminaryMechanismPEM unclearObservational

Influence of immediate hypersensitivity skin reactions on delayed reactions in patients with chronic fatigue syndrome.

Steinberg, P, Pheley, A, Peterson, P K·The Journal of allergy and clinical immunology·1996

This study looked at how immediate allergic skin reactions (like those that happen within minutes of allergen exposure) might affect delayed allergic reactions (which develop over hours or days) in people with ME/CFS. Researchers were investigating whether the immune system's early response to allergens could influence its later response in this patient population. Understanding these connections may help explain why some ME/CFS patients experience unusual or prolonged allergic reactions.

E3 PreliminaryReviewPEM unclearReview-Narrative

Sleep, neuroimmune and neuroendocrine functions in fibromyalgia and chronic fatigue syndrome.

Moldofsky, H·Advances in neuroimmunology·1995

This review examines how sleep problems, immune system dysfunction, and hormone imbalances may be connected in fibromyalgia and ME/CFS. The authors suggest that when the body's internal clock is disrupted, it can trigger a cascade of problems including poor sleep quality, pain, fatigue, and cognitive difficulties. They propose that studying these interconnected systems together—rather than separately—may help explain why these conditions are so disabling.

E3 PreliminaryMechanismPEM not requiredCross-Sectional

The disease associations of the antibody response against the Epstein-Barr virus transactivator protein ZEBRA can be separated into different epitopes.

Tedeschi, R, Foong, Y T, Cheng, H M et al.·The Journal of general virology·1995

This study looked at antibody patterns against a specific EBV protein called ZEBRA, which becomes active when the virus 'wakes up' from dormancy. Researchers found that different parts of this protein trigger antibodies in different diseases—some patterns were more common in people with nasopharyngeal cancer, others in people with infectious mononucleosis, and some in people with chronic fatigue syndrome. This suggests that the type of EBV reactivation may differ depending on the illness someone has.

E3 PreliminaryReviewPEM not requiredReview-Narrative

Are cytokines associated with neuropsychiatric syndromes in humans?

Hickie, I, Lloyd, A·International journal of immunopharmacology·1995

This paper suggests that immune molecules called cytokines—which your body produces during infections or inflammation—may affect your brain and behavior in ways that look like psychiatric symptoms such as depression, fatigue, loss of appetite, and difficulty thinking clearly. The authors review evidence from various illnesses where these immune-related behavioral changes happen together, including ME/CFS, and propose that cytokines may be the biological link between immune activation and these symptoms.

NeuroinflammationImmune System

E3 PreliminaryCohortPEM not requiredCase-Control

Chronic active Epstein-Barr virus disease in a case of persistent polyclonal B-cell lymphocytosis.

Mitterer, M, Pescosta, N, Fend, F et al.·British journal of haematology·1995

This report describes one patient who had an unusual blood disorder involving too many B cells (immune cells) along with symptoms resembling chronic fatigue syndrome, including persistent tiredness and recurring skin rashes. Testing showed the patient had a chronic active Epstein-Barr virus (EBV) infection with the virus actively replicating in their blood cells. The researchers suggest that persistent EBV replication may play a role in developing this lymphoproliferative disorder.

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PEM Immune Neuro Metabolic Biomarkers Severe ME Long COVID Cognitive

Curated Collections

Thematic groupings by clinical question or research area.

Neuroinflammation Evidence

PET imaging and other studies providing evidence for brain inflammation in ME/CFS.

Metabolism & Mitochondria

Metabolomics and mitochondrial function studies revealing energy metabolism disruption.

Biomarkers

Studies identifying potential biological markers for ME/CFS diagnosis and stratification.

PEM-Specific Research

Studies specifically examining post-exertional malaise, the hallmark symptom of ME/CFS.