On the other hand, I breastfed my ds until he was 17 months and he was constantly going from one chest infection to the next. I breastfed dd until 23 months and she had heaven knows how many ear infections that caused her eardrum to burst and was hospitalised twice. Her ear infections ceased when she was 2 (not because I had stopped feeding her but because she had matured). Unless my breastmilk is very inferior then it seems a bit pointless to produce anecdotes as a way of proving that long-term breastfeeding gives children stronger immune systems as there will always be counter-anecdotes, and it is impossible to do any controls!
Incidentally, does anyone have any evidence that IgA continues to be absorbed through infants' guts past babyhood? I know breastmilk always contains it, but certainly in other species the gut cease to be permeable beyond a certan point. I'm not being confrontational, just interested.