The goal of this clinical trial is to learn about the effectiveness of repeated immunoadsorption intervention in patients with chronic fatigue syndrome (CFS) including patients with post-acute COVID-19 CFS (PACS-CFS). The main questions it aims to answer are: (1) Does repeated immunoadsorption relieve fatigue and/or other symptoms associated with CFS and PACS-CFS? (2) Is repeated immunoadsorption safe and tolerable in this patient population? What are the side effects of repeated immunoadsorption, and how common are they? Participants will be asked to participate for approx. 32 weeks (8 months). After screening, participants will receive assigned intervention of either five immunoadsorption treatments (with Ig adsorber) every other day over 10 days or matching sham treatments (without Ig adsorber), followed by a 6-month follow-up period with three ambulatory visits. Every participant will undergo trial outcome, safety, and monitoring assessments. The results of this study will provide information on whether repeated immunoadsorption can alleviate symptoms associated with CFS and PACS-CFS, as well as insights into the pathophysiological processes in this condition, which in turn can help to develop new and effective therapies.
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Improvement in physical and mental fatigue as measured by the Chalder Fatigue Scale
Timeframe: 3 months after completion of immunoadsorption or sham apheresis