Number of one-year-olds who are not vaccinated against polio in Chad
Chad: Number of one-year-olds who are not vaccinated against polio was 242,358 one-year-olds in 2023. ▲ Rising
Number of one-year-olds who are not vaccinated against polio in Chad, 1984–2023
Source: WHO & UNICEF (2025); UN, World Population Prospects (2024) – processed by Our World in Data. Measured in one-year-olds.
Analysis
Chad recorded 242,358 one-year-olds for number of one-year-olds who are not vaccinated against polio in 2023.
That represents a change of down 18.5% on the previous year and down 21.1% over ten years.
Over the whole period, number of one-year-olds who are not vaccinated against polio in Chad peaked at 352,826 one-year-olds in 2019 and was at its lowest, 188,441 one-year-olds, in 1987.
That places Chad 22nd out of 194 countries with data for 2023, putting it in the top quarter.
The long-run direction has been consistently rising across the 40 years of available data.
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | 194,822 one-year-olds | 188,441 one-year-olds | 205,476 one-year-olds | 6 |
| 1990s | 240,422 one-year-olds | 202,820 one-year-olds | 253,128 one-year-olds | 10 |
| 2000s | 283,597 one-year-olds | 232,320 one-year-olds | 342,453 one-year-olds | 10 |
| 2010s | 321,013 one-year-olds | 270,572 one-year-olds | 352,826 one-year-olds | 10 |
| 2020s | 291,546 one-year-olds | 242,358 one-year-olds | 329,244 one-year-olds | 4 |
Countries ranked near Chad
- 19 United States 260,243 one-year-olds compare
- 20 Mozambique 255,544 one-year-olds compare
- 21 South Africa 251,724 one-year-olds compare
- 23 Mali 239,957 one-year-olds compare
- 24 Myanmar 237,934 one-year-olds compare
- 25 Cameroon 231,656 one-year-olds compare
More health data for Chad
- Estimated changes in temperature-related death rates compared to projected death rates 1,071 deaths per 1,000 people (2090)
- Number of infants who die before age 1 41,435 deaths (2100)
- Deaths in armed conflicts based on where they occurred 33 deaths (2026)
- Deaths in armed conflicts by region 33 deaths (2026)
- Age population, age 25, male, interpolated 173,746 (2025)
- Age population, age 25, female, interpolated 172,562 (2025)
- Age population, age 24, male, interpolated 178,917 (2025)
- Age population, age 24, female, interpolated 177,370 (2025)
- Age population, age 23, male, interpolated 183,288 (2025)
- Age population, age 23, female, interpolated 181,223 (2025)
Frequently asked questions
- What is number of one-year-olds who are not vaccinated against polio in Chad?
- Number of one-year-olds who are not vaccinated against polio in Chad was 242,358 one-year-olds in 2023, according to WHO & UNICEF (2025); UN, World Population Prospects (2024) – processed by Our World in Data.
- What is the highest number of one-year-olds who are not vaccinated against polio recorded in Chad?
- The highest recorded value was 352,826 one-year-olds in 2019.
- What is the lowest number of one-year-olds who are not vaccinated against polio recorded in Chad?
- The lowest recorded value was 188,441 one-year-olds in 1987.
- How does Chad rank for number of one-year-olds who are not vaccinated against polio?
- Chad ranks 22nd out of 194 countries with data for 2023.
- Is number of one-year-olds who are not vaccinated against polio rising or falling in Chad?
- Over the last ten years it is down 21.1%. The long-run trend across the full record is rising.
- Where does this Chad data come from?
- The figures come from WHO & UNICEF (2025); UN, World Population Prospects (2024) – processed by Our World in Data, published as part of Number of one-year-olds who are not vaccinated against polio. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 40 observations, free to reuse under CC BY 4.0 (Our World in Data).
About this data
Number of one-year-olds who have not had the third dose of either the oral or inactivated polio vaccine in a given year.