Hello guys, Welcome to Africa's Largest Video Search Engine, and you are watching What Is the Harm in Delaying or Spacing out Vaccines?. and this video is uploaded by The Children's Hospital of Philadelphia at 2015-08-11T13:24:25-07:00. We are just promoting this video only for entertainment and educational purpose only. I hop you like our Video Search Engine. [t401wOp6C8U]