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  Range of recommended ages for all children
  Range of recommended ages for certain high-risk groups
Range of recommended ages for all children and certain high-risk groups
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This project is supported by funding from the Centers for Disease Control and Prevention (Grant Number: U66IP000398) and, in part, by an unrestricted educational grant from Merck, Inc. Its contents do not necessarily reflect the official views of the CDC, the Society of Teachers of Family Medicine, or Merck, Inc..

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