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 0.6357 % change on previous year in 2023. ◆ Volatile
Number of one-year-olds who are not vaccinated against diphtheria in Chad, 1984–2023
Source: Statizoid (derived). Measured in % change on previous year.
Analysis
In 2023, number of one-year-olds who are not vaccinated against diphtheria in Chad stood at 0.6357 % change on previous year.
Compared with earlier readings it is up 107.7% on the previous year and down 86.7% over ten years.
Over the whole period, number of one-year-olds who are not vaccinated against diphtheria in Chad peaked at 25 % change on previous year in 2007 and was at its lowest, -16.48 % change on previous year, in 2010.
That places Chad 79th out of 194 countries with data for 2023, putting it in the middle of the range.
The series is highly variable year to year, so single readings are best treated with caution.
Number of one-year-olds who are not vaccinated against diphtheria in Chad, year by year
| Year | % change on previous year | Change |
|---|---|---|
| 1984 | 5.48 % change on previous year | — |
| 1985 | 7.39 % change on previous year | +34.8% |
| 1986 | -6.12 % change on previous year | -182.9% |
| 1987 | -3.43 % change on previous year | -44.0% |
| 1988 | 4.97 % change on previous year | -245.0% |
| 1989 | -1.34 % change on previous year | -126.9% |
| 1990 | 5.13 % change on previous year | -482.9% |
| 1991 | 7.22 % change on previous year | +40.7% |
| 1992 | 13.62 % change on previous year | +88.6% |
| 1993 | 1.02 % change on previous year | -92.5% |
| 1994 | -0.6911 % change on previous year | -168.0% |
| 1995 | 2.12 % change on previous year | -407.5% |
| 1996 | -0.6925 % change on previous year | -132.6% |
| 1997 | -0.0772 % change on previous year | -88.9% |
| 1998 | -13.24 % change on previous year | +17060.1% |
| 1999 | -10.03 % change on previous year | -24.3% |
| 2000 | 16.33 % change on previous year | -262.8% |
| 2001 | 23.05 % change on previous year | +41.1% |
| 2002 | 4.57 % change on previous year | -80.2% |
| 2003 | 5.61 % change on previous year | +22.8% |
| 2004 | 4.52 % change on previous year | -19.4% |
| 2005 | -0.8569 % change on previous year | -118.9% |
| 2006 | -16.32 % change on previous year | +1804.9% |
| 2007 | 25 % change on previous year | -253.2% |
| 2008 | 17.81 % change on previous year | -28.7% |
| 2009 | -5.84 % change on previous year | -132.8% |
| 2010 | -16.48 % change on previous year | +182.1% |
| 2011 | 15.33 % change on previous year | -193.1% |
| 2012 | -7.71 % change on previous year | -150.3% |
| 2013 | 4.76 % change on previous year | -161.8% |
| 2014 | 7.84 % change on previous year | +64.5% |
| 2015 | -7.03 % change on previous year | -189.7% |
| 2016 | 4.33 % change on previous year | -161.6% |
| 2017 | 1.87 % change on previous year | -56.8% |
| 2018 | -8.5 % change on previous year | -554.6% |
| 2019 | -9.25 % change on previous year | +8.9% |
| 2020 | -1.54 % change on previous year | -83.4% |
| 2021 | -13.17 % change on previous year | +756.5% |
| 2022 | -8.27 % change on previous year | -37.2% |
| 2023 | 0.6357 % change on previous year | -107.7% |
Chad compared with similar countries
- Chad's 0.6357 % change on previous year is above the median for low income countries, which is 0.6357 % change on previous year, 1.0× the median. (25 countries reporting)
- Chad's 0.6357 % change on previous year is below the median for Sub-Saharan Africa, which is 0.8149 % change on previous year, 78% of the median. (48 countries reporting)
Biggest year-on-year movements
Years where Number of one-year-olds who are not vaccinated against diphtheria in Chad changed far more than this series normally does. A large move can be a real event or a change in how the figure was measured — the source note below says who published it.
| Year | Change | From | To |
|---|---|---|---|
| 1998 | -17060.1% | -0.0772 % change on previous year | -13.24 % change on previous year |
| 2006 | -1804.9% | -0.8569 % change on previous year | -16.32 % change on previous year |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | 1.16 % change on previous year | -6.12 % change on previous year | 7.39 % change on previous year | 6 |
| 1990s | 0.4376 % change on previous year | -13.24 % change on previous year | 13.62 % change on previous year | 10 |
| 2000s | 7.39 % change on previous year | -16.32 % change on previous year | 25 % change on previous year | 10 |
| 2010s | -1.48 % change on previous year | -16.48 % change on previous year | 15.33 % change on previous year | 10 |
| 2020s | -5.59 % change on previous year | -13.17 % change on previous year | 0.6357 % change on previous year | 4 |
Countries ranked near Chad
- 76 Australia 0.895 % change on previous year compare
- 77 Sierra Leone 0.73 % change on previous year compare
- 78 Seychelles 0.6696 % change on previous year compare
- 80 Tonga 0.5872 % change on previous year compare
- 81 United Arab Emirates 0.3657 % change on previous year compare
- 82 Marshall Islands 0.1346 % change on previous year 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 0.6357 % change on previous year 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 25 % change on previous year in 2007.
- What is the lowest number of one-year-olds who are not vaccinated against diphtheria recorded in Chad?
- The lowest recorded value was -16.48 % change on previous year in 2010.
- How does Chad rank for number of one-year-olds who are not vaccinated against diphtheria?
- Chad ranks 79th out of 194 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 86.7%. The long-run trend across the full record is volatile.
- 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, annual growth rate. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 40 observations, free to reuse under Derived by Statizoid from the sources named on the page.
How this figure is calculated
The year-on-year percentage change in Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus. Computed from consecutive annual observations; years either side of a gap are skipped rather than bridged.
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
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
The year-on-year percentage change in Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus. Computed from consecutive annual observations; years either side of a gap are skipped rather than bridged.