Inside the ‘cyclone’ of brain fog many COVID-19 long haulers are still experiencing

A study not yet peer reviewed from Survivor Corps, in collaboration with Indiana University, University of California, Irvine and the Mayo Clinic, was released Tuesday. It surveyed more than 5,000 self-reported long haulers recruited from online COVID-19 support groups and showed that more than half of respondents had prolonged difficulty concentrating and more than a third experienced long-term memory problems and dizziness.