Lower pulmonary gas exchange may be linked to impaired cognitive function in long COVID patients  News-Medical.NetCognitive deficits after COVID-19 associated with brain injury biomarkers and volume loss  Nature.comLong COVID Hits the Young Harder Than the Old, Study Finds  U.S. News & World ReportMounting research shows that COVID-19 leaves its mark on the brain, including significant drops in IQ scores  Yahoo! VoicesNew research shows younger and middle-aged adults have worse long COVID symptoms than older adults  Northwestern Medicine Newsroom