Data
Number of one-year-olds who have not received the inactivated polio vaccine
What you should know about this indicator
- The current release of the WUENIC with data up to 2023 (released in 2024) includes estimates for WHO Member States, including those that did not report 2023 data. For these non-reporting countries, estimates were extrapolated from the last point informed by empirical data.
- Global and regional coverages, values were extrapolated from 2022 for non-reporting countries.
- Non-reporting countries represent ≈5% of the global 2023 cohort.
- These estimates are based on quantitative data: 1) Country reported coverage data (official and administrative coverage) and 2) survey coverage (from survey final reports, and complying with minimum set of quality criteria), and are informed by contextual information (e.g., stock-outs, changes in schedule, and other relevant information where available and appropriate). As such, these estimates are affected by the availability and quality of the underlying data.
- In countries utilizing an immunization schedule recommending either (i) a primary series of three doses of oral polio vaccine (OPV) plus at least one dose of IPV where OPV is included in routine immunization and/or campaign or (ii) a sequential schedule of IPV followed by OPV, WHO and UNICEF estimates for IPV1 reflect coverage with at least one routine dose of IPV among infants <1 year of age among countries. For countries utilizing IPV containing vaccine use only, i.e., no recommended dose of OPV, the WHO and UNICEF estimate for IPV1 corresponds to coverage for the 1st dose of IPV. Production of IPV coverage estimates, which begins in 2015, results in no change of the estimated coverage levels for the 3rd dose of polio (Pol3). For countries recommending routine immunization with a primary series of three doses of IPV alone, WHO and UNICEF estimated Pol3 coverage is equivalent to estimated coverage with three doses of IPV. For countries with a sequential schedule, estimated Pol3 coverage is based on that for the 3rd dose of polio vaccine regardless of vaccine type.
Number of one-year-olds who have not received the inactivated polio vaccine
The number of one-year-olds who have not received one-year-olds who receive their first dose of inactivated polio containing vaccine (IPV1) in a given year.
Source
WHO & UNICEF (2024); UN, World Population Prospects (2024) – processed by Our World in Data
Last updated
December 10, 2024
Next expected update
December 2025
Date range
2015–2023
Unit
unvaccinated one-year-olds
Sources and processing
This data is based on the following sources
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Citations
How to cite this page
To cite this page overall, including any descriptions, FAQs or explanations of the data authored by Our World in Data, please use the following citation:
“Data Page: Number of one-year-olds who have not received the inactivated polio vaccine”, part of the following publication: Samantha Vanderslott, Saloni Dattani, Fiona Spooner and Max Roser (2022) - “Vaccination”. Data adapted from WHO & UNICEF, United Nations. Retrieved from https://ourworldindata.org/grapher/ipv1-number-unvaccinated [online resource]How to cite this data
In-line citationIf you have limited space (e.g. in data visualizations), you can use this abbreviated in-line citation:
WHO & UNICEF (2024); UN, World Population Prospects (2024) – processed by Our World in DataFull citation
WHO & UNICEF (2024); UN, World Population Prospects (2024) – processed by Our World in Data. “Number of one-year-olds who have not received the inactivated polio vaccine” [dataset]. WHO & UNICEF, “WHO Immunization Data - Vaccination coverage”; United Nations, “World Population Prospects” [original data]. Retrieved January 13, 2025 from https://ourworldindata.org/grapher/ipv1-number-unvaccinated