Diphtheria - number of reported cases, annual growth rate in Chad
Chad: Diphtheria - number of reported cases, annual growth rate was -99.85 % change on previous year in 2025. ◆ Volatile
Latest (2025)
-99.85 % change on previous year
Change on year
down 134.7%
World rank
50th
of 140 countries
All-time high
400 % change on previous year
in 1977
All-time low
-100 % change on previous year
in 1978
Years of data
9
1975–2025
Diphtheria - number of reported cases, annual growth rate in Chad, 1975–2025
Source: Statizoid (derived). Measured in % change on previous year.
Analysis
The most recent figure for diphtheria - number of reported cases, annual growth rate in Chad is -99.85 % change on previous year, measured in 2025.
The figure is down 134.7% on the previous year.
Over the whole period, diphtheria - number of reported cases, annual growth rate in Chad peaked at 400 % change on previous year in 1977 and was at its lowest, -100 % change on previous year, in 1978.
That places Chad 50th out of 140 countries with data for 2025, putting it in the middle of the range.
Diphtheria - number of reported cases, annual growth rate in Chad, year by year
| Year | % change on previous year | Change |
|---|---|---|
| 1975 | -40 % change on previous year | — |
| 1976 | -66.67 % change on previous year | +66.7% |
| 1977 | 400 % change on previous year | -700.0% |
| 1978 | -100 % change on previous year | -125.0% |
| 1984 | 300 % change on previous year | -400.0% |
| 1985 | 150 % change on previous year | -50.0% |
| 1986 | -60 % change on previous year | -140.0% |
| 2024 | 287.33 % change on previous year | -578.9% |
| 2025 | -99.85 % change on previous year | -134.7% |
Chad compared with similar countries
- Chad's -99.85 % change on previous year is above the median for low income countries, which is -100 % change on previous year, 100% of the median. (20 countries reporting)
- Chad's -99.85 % change on previous year is above the median for Sub-Saharan Africa, which is -100 % change on previous year, 100% of the median. (34 countries reporting)
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1970s | 48.33 % change on previous year | -100 % change on previous year | 400 % change on previous year | 4 |
| 1980s | 130 % change on previous year | -60 % change on previous year | 300 % change on previous year | 3 |
| 2020s | 93.74 % change on previous year | -99.85 % change on previous year | 287.33 % change on previous year | 2 |
Countries ranked near Chad
- 47 Latvia -80 % change on previous year compare
- 48 Rwanda -92.86 % change on previous year compare
- 49 Afghanistan -97.58 % change on previous year compare
- 51 Albania -100 % change on previous year compare
- 51 United Arab Emirates -100 % change on previous year compare
- 51 Argentina -100 % change on previous year compare
- 51 Armenia -100 % change on previous year compare
- 51 Burundi -100 % change on previous year compare
- 51 Burkina Faso -100 % change on previous year compare
- 51 Bangladesh -100 % change on previous year compare
- 51 Bahrain -100 % change on previous year compare
- 51 Belarus -100 % change on previous year compare
- 51 Belize -100 % change on previous year compare
- 51 Bolivia -100 % change on previous year compare
- 51 Barbados -100 % change on previous year compare
- 51 Bhutan -100 % change on previous year compare
- 51 Botswana -100 % change on previous year compare
- 51 Central African Republic -100 % change on previous year compare
- 51 Chile -100 % change on previous year compare
- 51 China -100 % change on previous year compare
- 51 Congo -100 % change on previous year compare
- 51 Colombia -100 % change on previous year compare
- 51 Cape Verde -100 % change on previous year compare
- 51 Cuba -100 % change on previous year compare
- 51 Djibouti -100 % change on previous year compare
- 51 Dominican Republic -100 % change on previous year compare
- 51 Ecuador -100 % change on previous year compare
- 51 Egypt -100 % change on previous year compare
- 51 Eritrea -100 % change on previous year compare
- 51 Estonia -100 % change on previous year compare
- 51 Finland -100 % change on previous year compare
- 51 Georgia -100 % change on previous year compare
- 51 Ghana -100 % change on previous year compare
- 51 Guinea -100 % change on previous year compare
- 51 Greece -100 % change on previous year compare
- 51 Guatemala -100 % change on previous year compare
- 51 Guyana -100 % change on previous year compare
- 51 Hong Kong -100 % change on previous year compare
- 51 Honduras -100 % change on previous year compare
- 51 Hungary -100 % change on previous year compare
- 51 Iran -100 % change on previous year compare
- 51 Israel -100 % change on previous year compare
- 51 Jamaica -100 % change on previous year compare
- 51 Jordan -100 % change on previous year compare
- 51 Japan -100 % change on previous year compare
- 51 Kazakhstan -100 % change on previous year compare
- 51 Kyrgyzstan -100 % change on previous year compare
- 51 South Korea -100 % change on previous year compare
- 51 Kuwait -100 % change on previous year compare
- 51 Laos -100 % change on previous year compare
- 51 Lebanon -100 % change on previous year compare
- 51 Libya -100 % change on previous year compare
- 51 Sri Lanka -100 % change on previous year compare
- 51 Lesotho -100 % change on previous year compare
- 51 Lithuania -100 % change on previous year compare
- 51 Macao -100 % change on previous year compare
- 51 Morocco -100 % change on previous year compare
- 51 Moldova -100 % change on previous year compare
- 51 Mexico -100 % change on previous year compare
- 51 Mali -100 % change on previous year compare
- 51 Mongolia -100 % change on previous year compare
- 51 Mozambique -100 % change on previous year compare
- 51 Mauritius -100 % change on previous year compare
- 51 Malawi -100 % change on previous year compare
- 51 Nicaragua -100 % change on previous year compare
- 51 Oman -100 % change on previous year compare
- 51 Peru -100 % change on previous year compare
- 51 Papua New Guinea -100 % change on previous year compare
- 51 North Korea -100 % change on previous year compare
- 51 Portugal -100 % change on previous year compare
- 51 Paraguay -100 % change on previous year compare
- 51 Qatar -100 % change on previous year compare
- 51 Romania -100 % change on previous year compare
- 51 Russia -100 % change on previous year compare
- 51 Saudi Arabia -100 % change on previous year compare
- 51 Sudan -100 % change on previous year compare
- 51 Singapore -100 % change on previous year compare
- 51 El Salvador -100 % change on previous year compare
- 51 Serbia -100 % change on previous year compare
- 51 Syria -100 % change on previous year compare
- 51 Tajikistan -100 % change on previous year compare
- 51 Turkmenistan -100 % change on previous year compare
- 51 Trinidad and Tobago -100 % change on previous year compare
- 51 Tunisia -100 % change on previous year compare
- 51 Turkey -100 % change on previous year compare
- 51 Tanzania -100 % change on previous year compare
- 51 Uganda -100 % change on previous year compare
- 51 Ukraine -100 % change on previous year compare
- 51 United States -100 % change on previous year compare
- 51 Uzbekistan -100 % change on previous year compare
- 51 Venezuela -100 % change on previous year compare
- 51 Zambia -100 % change on previous year compare
- 51 Zimbabwe -100 % 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)
- Un projection of annual infant deaths 41,435 (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)
- Population ages 00-04, male, per capita 0.0924 units per person (2025)
Frequently asked questions
- What is diphtheria - number of reported cases, annual growth rate in Chad?
- Diphtheria - number of reported cases, annual growth rate in Chad was -99.85 % change on previous year in 2025, according to Statizoid (derived).
- What is the highest diphtheria - number of reported cases, annual growth rate recorded in Chad?
- The highest recorded value was 400 % change on previous year in 1977.
- What is the lowest diphtheria - number of reported cases, annual growth rate recorded in Chad?
- The lowest recorded value was -100 % change on previous year in 1978.
- How does Chad rank for diphtheria - number of reported cases, annual growth rate?
- Chad ranks 50th out of 140 countries with data for 2025.
- Where does this Chad data come from?
- The figures come from Statizoid (derived), published as part of Diphtheria - number of reported cases, annual growth rate. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 9 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 Diphtheria - number of reported cases. Computed from consecutive annual observations; years either side of a gap are skipped rather than bridged.
Computed from
- Diphtheria - number of reported cases World Health Organization, Global Health Observatory
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 Diphtheria - number of reported cases. Computed from consecutive annual observations; years either side of a gap are skipped rather than bridged.