"a mild case of COVID can lead to the equivalent of seven years of brain aging"
Including “fully recovered” people

COVID infections are causing drops in IQ and years of brain aging, studies suggest | CBC Radio
Researchers are trying to understand the profound effects of COVID-19 on the brain, looking at how it disrupts the blood-brain barrier, how it affects brain volume, and showing that even a mild case of COVID can lead to the equivalent of seven years of brain aging.
