A.N.
The same thing happened to us last May. It started with my niece, then my mom, my 3 kids, me, my husband, sister-in-law, even our babysitter and the girl who works in our office got it!!!! I think you're doing all you can environmentally, the only other thing you could do is work on your immune systems. Eat nutritiously (no sugar!), take a multi-vitamin, drink lots of water. My husband is a chiropractor, so adjustments are a regular routine for us as well. Knock on wood, that is the only time we have all gotten sick! Good luck!