Couldn't hurt to call your pediatrician's office. At best they think you are a worry wart. I'm sure they've handled at least dozens of calls just like yours already. At worse, could be the real deal and they'll want you to come in and you get anti viral drugs for your kids and keep them healthy. Rather be safe than sorry, no?

Me, I'm considering a trip to Mexico, Swine Flu sounds pretty good right now. No more worries.