Flu season starts earlier and ends later than you think. Be prepared – especially where your children and other at-risk family members are concerned. The close quarters of most classrooms make day-care and school environments the perfect places for the spread of infections, especially colds and flu. School-aged children have the highest rates of influenza infection and often pass the illness along to family members, caretakers and classmates. Learn the latest information about this season's flu virus and the best strategies for fighting it to keep your family healthy.