Kids are a whole heap sicker today, than in the past.
Even the old time doctors will scratch their heads when describing the average paediatric patient in 1940 or 50 and the average paediatric patient today.
to me it's a combo hit.
Lousy birth and formula starts the slide, vaccines are the first monkey wrench, then toss in serial body flora napalming anitbiotics, and parents who dont' realise that the constant use of tylenol for every ailment under the sun, constantly disables the inate immune system and creates allergies.
it's all there in the medical literature yet, paediatricians say very little about that. come to think of it, if they did, their incomes would drop, so they toe the party line, because that makes greater economic sense...
sorry for the OT veer...