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Age (in months) of fourth HIB shot from record and verbal history

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For sample children under 6 years old who reported any information regarding their Hepatitis B vaccine(s) and who received at least four Hepatitis B vaccines, IMAHIBAGE4 reports the person's age when he or she received the fourth Hepatitis B vaccine.

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There are no comparability issue with this variable.


  • 1991: Sample persons under age 6 who reported any information on HIB shots and received four or more HIB shots.


  • 1991