There are some interesting analogs between ME and PPS. I believe the onset of PPS is normally thought to be x number of years following the infection, not necessarily at a certain age. There could be an age factor too though, I don't know a lot about it.
I think this makes sense, surprised more researchers and doctors aren't exploring this possibility
As I understand it the concept of PPS is that neurons that were previously compensating with extra dendrites give out and functionality consequentially diminishes