Yes, you are correct. This will be the next big thing. We're hurting kids after all. I've seen headlines around this saying its "new" but in fact its been a thing for decades. I first heard about something like this during my research on Interleukin-6.
It is NOT, to the best of my recollection (I've not thought about this in a while) related to a specific virus. But moreso arthritis and auto-immune responses.