DS2 (3) vomited during the night on Saturday, then again on Sunday afternoon and again this morning (Monday).
He is completely normal and well right up to the point he vomits and as soon as he is cleaned up. No diarrhoea. No temperature. Not projectile, nor unusually stinky (which IME norovirus vomit is). So far, no-one else in the household has got it.
It doesn't seem like norovirus to me. Anyone else got an idea what it might be? He is off his food as well, though eating a bit of plain stuff and cake.