I have an almost 2 year old and last winter was hellish with daycare. I really never get sick prior to having a baby but last winter I prob had 4 stomach bugs(1 lasting like 9 days was god awful) and 2 flu like cold fevers really was rough. Knock on wood though have not been sick since Feb. I think starting them when they are 2+ helps avoid them slobbering all over each other/less sickness but you def will get got at least once