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
Latest (2023)
242,358 one-year-olds
Change on year
down 18.5%
World rank
22nd
of 194 countries
All-time high
352,826 one-year-olds
in 2019
All-time low
188,441 one-year-olds
in 1987
Years of data
40
1984–2023
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.
Number of one-year-olds who are not vaccinated against polio in Chad, year by year
| Year | one-year-olds | Change |
|---|---|---|
| 1984 | 189,367 one-year-olds | — |
| 1985 | 205,476 one-year-olds | +8.5% |
| 1986 | 197,181 one-year-olds | -4.0% |
| 1987 | 188,441 one-year-olds | -4.4% |
| 1988 | 195,542 one-year-olds | +3.8% |
| 1989 | 192,922 one-year-olds | -1.3% |
| 1990 | 202,820 one-year-olds | +5.1% |
| 1991 | 217,462 one-year-olds | +7.2% |
| 1992 | 247,074 one-year-olds | +13.6% |
| 1993 | 252,454 one-year-olds | +2.2% |
| 1994 | 247,861 one-year-olds | -1.8% |
| 1995 | 253,128 one-year-olds | +2.1% |
| 1996 | 251,375 one-year-olds | -0.7% |
| 1997 | 251,181 one-year-olds | -0.1% |
| 1998 | 245,588 one-year-olds | -2.2% |
| 1999 | 235,274 one-year-olds | -4.2% |
| 2000 | 257,509 one-year-olds | +9.5% |
| 2001 | 280,650 one-year-olds | +9.0% |
| 2002 | 269,997 one-year-olds | -3.8% |
| 2003 | 257,614 one-year-olds | -4.6% |
| 2004 | 286,583 one-year-olds | +11.2% |
| 2005 | 273,444 one-year-olds | -4.6% |
| 2006 | 232,320 one-year-olds | -15.0% |
| 2007 | 293,364 one-year-olds | +26.3% |
| 2008 | 342,039 one-year-olds | +16.6% |
| 2009 | 342,453 one-year-olds | +0.1% |
| 2010 | 295,707 one-year-olds | -13.7% |
| 2011 | 321,490 one-year-olds | +8.7% |
| 2012 | 270,572 one-year-olds | -15.8% |
| 2013 | 307,267 one-year-olds | +13.6% |
| 2014 | 327,509 one-year-olds | +6.6% |
| 2015 | 287,983 one-year-olds | -12.1% |
| 2016 | 344,580 one-year-olds | +19.7% |
| 2017 | 351,020 one-year-olds | +1.9% |
| 2018 | 351,174 one-year-olds | +0.0% |
| 2019 | 352,826 one-year-olds | +0.5% |
| 2020 | 329,244 one-year-olds | -6.7% |
| 2021 | 297,090 one-year-olds | -9.8% |
| 2022 | 297,492 one-year-olds | +0.1% |
| 2023 | 242,358 one-year-olds | -18.5% |
Chad compared with similar countries
- Chad's 242,358 one-year-olds is above the median for low income countries, which is 162,231 one-year-olds, 1.5× the median. (25 countries reporting)
- Chad's 242,358 one-year-olds is above the median for Sub-Saharan Africa, which is 59,256 one-year-olds, 4.1× the median. (48 countries reporting)
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
- Un projection of annual infant deaths, annual growth rate -0.9964 % change on previous year (2100)
- Heat deaths vs projected death rates, annual growth rate 0.6578 % change on previous year (2090)
- 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)
- Neonatal tetanus - number of reported cases, gaps filled 245 (2025)
- Population ages 00-04, female, annual growth rate 3.76 % change on previous year (2025)
- Population ages 00-04, female, per unit of GDP 0.0001 units per US$ of GDP (2025)
- Population ages 00-04, female, per capita 0.0898 units per person (2025)
- Population ages 00-04, male, annual growth rate 3.77 % change on previous year (2025)
- Population ages 00-04, male, per unit of GDP 0.0001 units per US$ of GDP (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.
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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.