Centers for Disease Control and Prevention

www.cdc.gov/actearly

It provides the Milestones from birth to age 5 and the Immunizations (shots) in U.S.A.

美國疾病管理預防中心網站，提供許多關於孩子發展得注意事項以及發展里程，寫得很簡單又很清楚；另外也有關於H1N1的文章。http://www.cdc.gov/h1n1flu/