New evidence has doctors worried about long-term damage from COVID 'brain fog' • 5 min read How to clear up ‘brain fog’ Dr. Kristen Willeumier gives tips on how to improve brain function and overall health while dealing with the challenges of working from home and being confined inside. Phill Magakoe/Pool via Reuters/FILE A flurry of new scientific findings is prompting renewed concern among doctors about the long-term cognitive impacts of COVID-19 in some patients. Several new studies presented at the Alzheimer's Association International Conference, being held this week in Denver, have found that many COVID-19 patients experience "brain fog" and other cognitive impairments months after recovery. This adds to a growing body of research on COVID-19's apparent long-haul symptoms, which can include confusion, forgetfulness and other worrying signs of memory loss.