The Perrin Technique™ Masterclass Workshop is a rare, three-day, hands-on osteopathic training led by Raymond M. Perrin, DO, PhD, focused on treating ME/CFS, Long COVID, Fibromyalgia, and post-viral neuro-lymphatic dysfunction. Hosted in Rochester, Michigan, this intimate course equips licensed healthcare and manual therapy professionals with evidence-informed techniques, certification pathways, and practical skills to support patients with complex chronic conditions.