IPUMS NHIS: descr: IMRPOLNO

IPUMS NHIS

NATIONAL HEALTH INTERVIEW SURVEY

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IMRPOLNO

Number of polio vaccines on record

Codes and Frequencies

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For sample persons under age 7, with available shot records, IMRPOLDA1 reports the number of polio vaccines on record.

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Apart from changes in the universe, this variable is mostly comparable over time.

1997: Sample children under age 7 and all children 19 to 35 months old in quarters 1 and 2 and 12 to 35 months old in quarters 3 and 4 with available shot records.
1998-2002: Sample children under age 7 and all children 12 to 35 months old with available shot records.
2003: Sample children under age 7 with available shot records.