A lot more in the first few years of doing daycare than now 26 years later. What I do find though is I get sluggish rather than sick so feel more dragging but at least I can cope. At the same time there is something to be said for just being sick for a couple of days and getting it over with. Your own kids will build up their immunity too which also helps you since you won't be dealing with as many illnesses on the weekends too.