Number of one-year-olds who are not vaccinated against diphtheria in Chad
Chad: Number of one-year-olds who are not vaccinated against diphtheria was 0.1925 one-year-olds per square kilometre in 2023. ▲ Rising
Number of one-year-olds who are not vaccinated against diphtheria in Chad, 1983–2023
Source: Statizoid (derived). Measured in one-year-olds per square kilometre.
Analysis
The most recent figure for number of one-year-olds who are not vaccinated against diphtheria in Chad is 0.1925 one-year-olds per square kilometre, measured in 2023.
That represents a change of up 0.6% on the previous year and down 30.2% over ten years.
Over the whole period, number of one-year-olds who are not vaccinated against diphtheria in Chad peaked at 0.3143 one-year-olds per square kilometre in 2008 and was at its lowest, 0.1441 one-year-olds per square kilometre, in 1983.
That places Chad 76th out of 192 countries with data for 2023, putting it in the middle of the range.
The long-run direction has been consistently rising across the 41 years of available data.
Number of one-year-olds who are not vaccinated against diphtheria in Chad, year by year
| Year | one-year-olds per square kilometre | Change |
|---|---|---|
| 1983 | 0.1441 one-year-olds per square kilometre | — |
| 1984 | 0.152 one-year-olds per square kilometre | +5.5% |
| 1985 | 0.1632 one-year-olds per square kilometre | +7.4% |
| 1986 | 0.1532 one-year-olds per square kilometre | -6.1% |
| 1987 | 0.1479 one-year-olds per square kilometre | -3.4% |
| 1988 | 0.1553 one-year-olds per square kilometre | +5.0% |
| 1989 | 0.1532 one-year-olds per square kilometre | -1.3% |
| 1990 | 0.1611 one-year-olds per square kilometre | +5.1% |
| 1991 | 0.1727 one-year-olds per square kilometre | +7.2% |
| 1992 | 0.1962 one-year-olds per square kilometre | +13.6% |
| 1993 | 0.1982 one-year-olds per square kilometre | +1.0% |
| 1994 | 0.1968 one-year-olds per square kilometre | -0.7% |
| 1995 | 0.201 one-year-olds per square kilometre | +2.1% |
| 1996 | 0.1996 one-year-olds per square kilometre | -0.7% |
| 1997 | 0.1995 one-year-olds per square kilometre | -0.1% |
| 1998 | 0.1731 one-year-olds per square kilometre | -13.2% |
| 1999 | 0.1557 one-year-olds per square kilometre | -10.0% |
| 2000 | 0.1811 one-year-olds per square kilometre | +16.3% |
| 2001 | 0.2229 one-year-olds per square kilometre | +23.0% |
| 2002 | 0.2331 one-year-olds per square kilometre | +4.6% |
| 2003 | 0.2461 one-year-olds per square kilometre | +5.6% |
| 2004 | 0.2573 one-year-olds per square kilometre | +4.5% |
| 2005 | 0.2551 one-year-olds per square kilometre | -0.9% |
| 2006 | 0.2134 one-year-olds per square kilometre | -16.3% |
| 2007 | 0.2668 one-year-olds per square kilometre | +25.0% |
| 2008 | 0.3143 one-year-olds per square kilometre | +17.8% |
| 2009 | 0.296 one-year-olds per square kilometre | -5.8% |
| 2010 | 0.2472 one-year-olds per square kilometre | -16.5% |
| 2011 | 0.2851 one-year-olds per square kilometre | +15.3% |
| 2012 | 0.2631 one-year-olds per square kilometre | -7.7% |
| 2013 | 0.2757 one-year-olds per square kilometre | +4.8% |
| 2014 | 0.2972 one-year-olds per square kilometre | +7.8% |
| 2015 | 0.2763 one-year-olds per square kilometre | -7.0% |
| 2016 | 0.2883 one-year-olds per square kilometre | +4.3% |
| 2017 | 0.2937 one-year-olds per square kilometre | +1.9% |
| 2018 | 0.2687 one-year-olds per square kilometre | -8.5% |
| 2019 | 0.2439 one-year-olds per square kilometre | -9.3% |
| 2020 | 0.2401 one-year-olds per square kilometre | -1.5% |
| 2021 | 0.2085 one-year-olds per square kilometre | -13.2% |
| 2022 | 0.1913 one-year-olds per square kilometre | -8.3% |
| 2023 | 0.1925 one-year-olds per square kilometre | +0.6% |
Chad compared with similar countries
- Chad's 0.1925 one-year-olds per square kilometre is below the median for low income countries, which is 0.4431 one-year-olds per square kilometre, 43% of the median. (25 countries reporting)
- Chad's 0.1925 one-year-olds per square kilometre is below the median for Sub-Saharan Africa, which is 0.2848 one-year-olds per square kilometre, 68% of the median. (48 countries reporting)
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | 0.1527 one-year-olds per square kilometre | 0.1441 one-year-olds per square kilometre | 0.1632 one-year-olds per square kilometre | 7 |
| 1990s | 0.1854 one-year-olds per square kilometre | 0.1557 one-year-olds per square kilometre | 0.201 one-year-olds per square kilometre | 10 |
| 2000s | 0.2486 one-year-olds per square kilometre | 0.1811 one-year-olds per square kilometre | 0.3143 one-year-olds per square kilometre | 10 |
| 2010s | 0.2739 one-year-olds per square kilometre | 0.2439 one-year-olds per square kilometre | 0.2972 one-year-olds per square kilometre | 10 |
| 2020s | 0.2081 one-year-olds per square kilometre | 0.1913 one-year-olds per square kilometre | 0.2401 one-year-olds per square kilometre | 4 |
Countries ranked near Chad
- 73 South Africa 0.2075 one-year-olds per square kilometre compare
- 74 Senegal 0.2065 one-year-olds per square kilometre compare
- 75 Vanuatu 0.2029 one-year-olds per square kilometre compare
- 77 El Salvador 0.1906 one-year-olds per square kilometre compare
- 78 Saint Vincent and the Grenadines 0.1905 one-year-olds per square kilometre compare
- 79 Ghana 0.187 one-year-olds per square kilometre 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 diphtheria in Chad?
- Number of one-year-olds who are not vaccinated against diphtheria in Chad was 0.1925 one-year-olds per square kilometre in 2023, according to Statizoid (derived).
- What is the highest number of one-year-olds who are not vaccinated against diphtheria recorded in Chad?
- The highest recorded value was 0.3143 one-year-olds per square kilometre in 2008.
- What is the lowest number of one-year-olds who are not vaccinated against diphtheria recorded in Chad?
- The lowest recorded value was 0.1441 one-year-olds per square kilometre in 1983.
- How does Chad rank for number of one-year-olds who are not vaccinated against diphtheria?
- Chad ranks 76th out of 192 countries with data for 2023.
- Is number of one-year-olds who are not vaccinated against diphtheria rising or falling in Chad?
- Over the last ten years it is down 30.2%. The long-run trend across the full record is rising.
- Where does this Chad data come from?
- The figures come from Statizoid (derived), published as part of Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus, per square kilometre. Statizoid updates them automatically from the source API.
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CSV · JSON — 41 observations, free to reuse under Derived by Statizoid from the sources named on the page.
How this figure is calculated
Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus divided by Land area (sq. km), matched on country and year. Neither publisher issues this ratio as a series; it is computed here from both.
Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus ÷ Land area (sq. km)
Computed from
- Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus WHO & UNICEF (2025); UN, World Population Prospects (2024) – processed by Our World in Data
- Land area FAOSTAT, Food and Agriculture Organization of the United Nations (FAO)
Statizoid computes this series; the underlying measurements belong to the publishers named above. The arithmetic is applied to every country and year where both inputs report, and nothing is estimated unless the page says so.
About this data
Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus divided by Land area (sq. km), matched on country and year. Neither publisher issues this ratio as a series; it is computed here from both.