From the linked article > those with COVID-19 had greater microglial reactivity than those in the control group, in a pattern that matched what was found in th

From the linked article > those with COVID-19 had greater microglial reactivity than those in the control group, in a pattern that matched what was found in the mice. This is evidence that brain fog isn't just "a culturally-conditioned response." Rather, we can physically measure an impact of covid on the brain.