It's not a new term, only the "adult" part of it.
Sudden INFANT death snydrome
Because you know, sometimes children JUST die. Yeah, just die, just like that. Snap.
And most of the time you know, yes they were injected with a vaccine some days or weeks prior, but that can't be it, says the expert, so it must have been the parents that killed the child. So take the parents and throw them in jail too.
Truly satanic.