This is not the same situation but it might be relevant to you. I am the father of two little germ vectors and I got tired of constantly catching whatever it was they brought home that day.

I switched my diet and began a regimen if Kale shakes for breakfast. These shakes coupled with exercise (I am a strong proponent of exercise for general well being) have kept me sickness free for the last year.

You will need a very good blender for this drink and here is the recipe:

A large slice if ginger 1/6 of a lemon two carrots an orange- with a knife shave the orange colored peal off and keep as much of the "white peal" as possible 1/4 cup flax seed 1/2 a banana 1" thick slice of pineapple a handful of blue berries an entire bundle of Kale Top off with water- makes about 3qts Note- if you want the drink a littler sweeter add a scope or two of orange juice concentrate. Best of luck to you!