Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.
For children born in the 3 to 5 years before the survey, VACOPV0 (H0) indicates whether the child has received an oral polio vaccine (OPV) dose at or near birth (sometimes called "polio 0"). The birth dose of the oral polio vaccine is administered as drops in the mouth.
The oral polio vaccination primary series usually consists of a birth dose and 3 additional administrations. The complementary variables VACOPV1 (H4), VACOPV2 (H6), and VACOPV3 (H8) report the first, second, and third administrations, respectively.
VACOPV0 uses composite coding, with a first digit of 2 indicating the child has been vaccinated, and the second digit indicating the source of information (a dated entry on the vaccination card, an undated mark on the vaccination card, or the mother's report).