http://www.cdc.gov/flu/protect/children.htm
Centers for Disease Control and Prevention, U.S. Department of Health and Human Services
This page presents recommendations from the Centers for Disease Control and Prevention (CDC) on which children should get a flu vaccine. CDC recommends that healthy children aged 6 months up through their 5th birthday, their close contacts (people who live with them), and out-of-home caregivers (nannies, daycare providers, etc.) should get a flu vaccine. This expands last year’s recommendation to now include vaccination for children 2 years old up to their 5th birthday this flu season.