Sylvia, As you posted, breastfeeders can get rotavirus. The diifference between breastfeeders or vaccinated bottle feeders vs unvaccinated bottle feeders is the need for IV fliuds. As the ped said its very contagoius. I and a few other of my pedaitrian freinds refer to play groups as "infection clubs". Chances are the parents have diarrhea too. -Rob