This is my eldest's first year at school it isn't so bad because he went to preschool for the two years before so has already built up immunity and so have we to allot of things but i am still noticing allot of bugs coming home like gastro etc , i think over time you will build up a better immunity so wont catch things so often but being a school with hundreds of kids with who knows what your bound to catch a fair few things every year
one thing Ive done is Ive gotten way more hygienic for myself when ever they are sick i wash my hands doctor style so i wash up to my elbow for 2 minutes in hot water after having to touch them or things that have been thrown up on etc i have anti bacterial household cleaners , i never used to worry so much about germs and i didn't want to be over clean because sometimes that can make things worse when you eventually do catch something but with 2 children and one on the way i cant afford to get sick so i pretty much do everything in my power to not catch it so i can look after them when they do ,,, another thing i find useful is when they do catch something go on the net find out what it could be and the ways its spread that way you know how to avoid it better also find out its incubation period so you no when they are contagious and when you would be likely to start showing symptoms should you have it so you can avoid others like your husband or other children
since Ive been doing that i have managed to miss 2 out of the last 3 hope that helps