I would be cautious with echinacea if there are any autoimmune diseases in the family. It's counter indicated for both SLE (which I have, that's why I noticed the post), rheumatoid arthritis, and some other conditions. Apparently, it's effective enough to affect white cell count, which isn't what you want if there's any auto immune problems. While kids don't normally have these conditions, if they are in the family it might be best to avoid echinacea, anyway. And it's allergenic. None of this may apply to your family, but I thought I'd give you a head's up. I think the probiotics for prevention does make sense.
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