Between the ages of 1-2 (started nursery at 1) DS caught every illness going - I honestly used up nearly all of my annual leave staying home to look after him when he was too poorly for nursery (as did DH) and even on our only holiday he was sick.
Nothing major apart from chicken pox, just high temps/D&V etc.
I assume this is par for the course (GP said they are always ill between 1 and 2 and he wasn't kidding!) and since DS turned 2 it has got a bit better. However looking back I realise he's still been off nursery about once a month, usually for a few days. Either temp or D&V again (currently on day 4 of sickness that's going round nursery). Is this a lot?
Since our working arrangements changed I've not noticed it quite as much but that still seems fairly often for an otherwise healthy boy. He eats and sleeps well and has no ongoing health complaints.