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Age when first polio vaccine was received: Number of units (no shot record available)

Codes and Frequencies

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For sample persons under age 6 who ever received at least one polio vaccination, IMNPOLAGN1 reports the number of units for the age when the first polio vaccine was received. IMNPOLAGN1 should be used in conjunction with IMNPOLAGTP1, which reports the corresponding time unit (months or years) stated by the respondent.

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There are no comparability issues.


  • 1991: Sample persons under age 6 with no available shot record who ever received an immunization and ever received at least one polio vaccination.


  • 1991