This has to be the doing of the lobby. I wonder if it’s possible to figure out who was involved through FOI requests? Is that a thing in France?
Im French and we are sure that it s Lemogne and Ranque s responsabilty.
Who are Cédric Lemogne and Brigitte Ranque, and what is their position on Long COVID and ME/CFS?
To understand part of the current debate in France around Long COVID, ME/CFS, post-exertional malaise (PEM), CBT, and rehabilitation, two names come up repeatedly: Cédric Lemogne and Brigitte Ranque.
They are not physicians operating outside the French public hospital system. On the contrary, they hold important positions within Assistance Publique–Hôpitaux de Paris (AP-HP).
Cédric Lemogne is a psychiatrist and head of the adult psychiatry department at Hôtel-Dieu, AP-HP.
Brigitte Ranque is a professor of internal medicine and head of the internal medicine department at Hôpital Européen Georges-Pompidou, AP-HP.
They are also directly involved in CASPer, the Hôtel-Dieu care pathway dedicated to patients with persistent symptoms, particularly after COVID. On the official AP-HP page describing CASPer, Brigitte Ranque is listed among the program leadership and Cédric Lemogne as the psychiatry lead. The program includes, among others, internists, psychiatrists, psychologists, sports medicine specialists, and adapted physical activity professionals.
Their scientific position is not simply that “Long COVID is imaginary.” That would be a caricature. However, for several years they have defended a biopsychosocial interpretation of Long COVID and have given significant weight to psychological, cognitive, behavioral, and functional mechanisms in the persistence of symptoms.
In 2021, Lemogne and Ranque took part in a French study published in JAMA Internal Medicine involving 26,823 people. It concluded that self-reported belief of having had COVID was more strongly associated with most persistent symptoms than a positive SARS-CoV-2 serology result, with positive serology being statistically associated only with anosmia in their adjusted analysis. The authors discussed, among other things, symptom perception and potentially maladaptive health behaviors. This publication became one of the first major points of controversy.
In 2023, Lemogne, Ranque and colleagues went even further in this direction by publishing an editorial with the explicit title: “Why the hypothesis of psychological mechanisms in long COVID is worth considering.”
In 2024, Lemogne, Ranque and several colleagues published another editorial arguing that a French national committee had not sufficiently acknowledged, in their view, the relevance of a biopsychosocial approach to Long COVID. This time, the concept appeared directly in the title of the publication.
They have also worked on the concept of functional somatic disorders. Lemogne and Ranque co-authored a 2024 paper on mind-body approaches in the management of these disorders. Even more significantly in relation to Long COVID, in August 2026 the CASPer team published a study examining quality of life in Long COVID patients according to whether or not they met diagnostic criteria for a functional somatic disorder (FSD). Ranque and Lemogne were among the co-authors.
The disagreement becomes particularly important when it comes to PEM and deconditioning.
In 2025, Ranque, Lemogne and several co-authors challenged, in Nature Communications, the interpretation of the Appelman and Wüst study showing muscle abnormalities after exercise in Long COVID patients with PEM. They argued that some findings might be related to deconditioning, questioned the interpretation that exercise necessarily caused PEM-specific tissue damage, and proposed an alternative explanation involving an interaction between altered interoception, allostatic load, peripheral influences, and brain function. They also wrote that fear of PEM could lead to symptom-focused attention, avoidance of exertion, further deconditioning, and disability.
This is probably one of the passages that best explains why their approach has generated such strong opposition among some ME/CFS specialists and many patients.
The authors of the original study responded to them directly in Nature Communications. Wüst and colleagues stated that they rejected the deconditioning explanation, emphasizing in particular that physiological differences were observed in patients with PEM even when compared with controls with similar levels of physical activity.
It is therefore important to be precise: Ranque and Lemogne do not necessarily deny the existence of biological mechanisms in Long COVID or ME/CFS. Their position is more nuanced. They argue that these mechanisms should be integrated into a biopsychosocial model in which interoception, symptom-focused attention, expectations, behavior, avoidance of exertion, deconditioning, and functional mechanisms may play an important causal or perpetuating role.
This is precisely the framework that is challenged by part of the current research on PEM and ME/CFS, which instead argues that reduced activity is primarily a consequence of exertion intolerance and PEM, rather than their cause, and that describing avoidance of exertion as a mechanism maintaining the illness risks leading to inappropriate treatment approaches.
Finally, their connection to AP-HP is important to keep in mind: we are not simply talking about two researchers expressing an academic opinion. Lemogne heads an AP-HP psychiatry department, Ranque heads an AP-HP internal medicine department, and both are directly involved in the Hôtel-Dieu CASPer pathway for persistent symptoms and Long COVID. Their school of thought therefore has a real institutional foothold within the French Long COVID care system.
This does not prove, of course, that they alone determine AP-HP policy or the position of the French national health insurance system. And regarding the recent changes to the Ameli page on ME/CFS, I have not found any evidence showing that they personally intervened in its drafting or modification. It would therefore be going too far to make that claim.
What can be stated factually, however, is that some of the wording surrounding CBT, rehabilitation, deconditioning, and functional improvement belongs to a scientific debate in which Ranque and Lemogne have been actively involved for several years, with a clearly identifiable and extensively published position.