“COVID and brain fog. For millions, it’s the most disabling legacy of the pandemic. Now, a new brain imaging study reveals a clear biological basis - and the parallels with other diseases are not encouraging.🧵”

“New brain MRI study (2025): Post-COVID patients show measurable structural changes - even without hospitalization. Participants were not selected for having Long COVID! What was found, why it matters, and how this fits into what we know about hypothalamus-related circuits.”