I've seen a number of different studies that indicate that there's more going on than just fever that causes the brain and systemic damage.
I'm not enough of a biologist to understand it very well, but I believe what they were saying was that once the virus damages the lining of the lungs, it then uses that to get into the bloodstream, where, if you're unlucky, it starts damaging your blood vessels. All of them.
This would then explain both the higher incidence of brain inflammation, strokes, etc, in adults, and the COVID-related inflammatory syndrome in otherwise asymptomatic children. Or so the articles I was reading claimed. (Apologies for lack of sourcing; I didn't think to save links.)
I'm not enough of a biologist to understand it very well, but I believe what they were saying was that once the virus damages the lining of the lungs, it then uses that to get into the bloodstream, where, if you're unlucky, it starts damaging your blood vessels. All of them.
This would then explain both the higher incidence of brain inflammation, strokes, etc, in adults, and the COVID-related inflammatory syndrome in otherwise asymptomatic children. Or so the articles I was reading claimed. (Apologies for lack of sourcing; I didn't think to save links.)