Codes and Frequencies
For sample children, IMRPOL reports whether the child had Polio vaccine on record.
Please use the IPUMS NHIS drop down menu and search functions for related variables.
- 1978: Sample persons under 17 years of age
- 1991: Sample persons under 6 years of age.
- 1992-1993: Sample persons under age 6, with any information transcribed from a shot record.
- 1994-1996: Sample persons under age 6, and all children 19 to 35 months old, with any information transcribed from a shot record.
- 1978, 1991-1996