New Blood Test Promises Accurate Diagnosis for ‘Invisible’ Illness Affecting Hundreds of Thousands Friday, October 10, 2025 chronicfatigue diagnosis bloodtest illness cfs invisible fatigue medicalresearch health patients For years, individuals suffering from chronic fatigue syndrome (CFS) have faced skepticism and misunderstanding, often being told their symptoms are “all in their head.” This debilitating condition, marked by extreme fatigue … Read More