From the article:
“…two new studies published in the New England Journal of Medicine shed further light on the profound toll of COVID-19 on cognitive health.” And in other studies cases “with mild to moderate COVID-19 showed significant prolonged inflammation of the brain and changes that are commensurate with seven years of brain aging.”
Not a doctor so may be a stupid question, but wouldn’t the blood brain barrier protection stuff degrade or shut down when you die? Could it have leaked in after death?
My understanding is it can happen while alive.
Here is an article explaining it: https://asm.org/Articles/2020/April/How-Pathogens-Penetrate-the-Blood-Brain-Barrier
One of the studies cited in the article found that COVID-19 damages (or can damage) the blood-brain barrier.
Considering the number of people who end up with “brain fog” this seems a likely way for it to enter the brain.