Dr. Sanjay Gupta On Call: What are your questions about staying healthy as kids head back to school?

When children head back to school, they come home with new friends, new knowledge and germs. But there are ways to stay healthy — or at least reduce your misery — in this season of stomach bugs, sniffles, sneezes, and surprise rashes. What are your questions about avoiding illness and staying healthy as kids head back to school this year? Share your questions below.