Geneva, Switzerland, June 28, 2024 – 7:00 am CEST – The GNC-501 clinical trial is a Phase 2 study in patients suffering from post-COVID-19 neuropsychiatric syndromes, testing temelimab against placebo. The study enrolled over 200 patients in Switzerland, Spain and Italy who had tested positive for HERV-W ENV. The top-line results from this study show that treated patients had no clinically meaningful improvement compared to placebo on the primary endpoint measuring the improvement of fatigue with the PROMIS SF7a test. The majority of secondary endpoints did not show an effect either. The treatment was very well tolerated and safe, consistent with previous clinical trials in other indications.