Study Says COVID May Cause Brain Fog by Affecting Spinal FluidRalph Ellis -ࠠ January 21, 2022Editor's note: Find the latest COVID-19 news and guidance in Medscape'sïronavirus Resource Center.A small study..#Multiple Sclerosis·disorders.solutions·Jan 28, 2022Study Says COVID May Cause Brain Fog by Affecting Spinal Fluid