Chad vs South Africa: Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus
Chad
242,358 one-year-olds
in 2023
South Africa
251,724 one-year-olds
in 2023
Chad rank
20th
South Africa rank
19th
Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus over time
- Chad
- South Africa
How they compare
South Africa currently reports 251,724 one-year-olds against 242,358 one-year-olds in Chad, a difference of 9,366 one-year-olds.
The two have swapped places 4 times across 41 shared years of data; in 1983 it was South Africa ahead.
Chad ranks 20th and South Africa ranks 19th of 194 countries.
Across the 5 decades both report, Chad averaged higher in 3 and South Africa in 2.
Head to head by decade
| Decade | Chad | South Africa | Difference | Ahead |
|---|---|---|---|---|
| 1980s | 192,264 one-year-olds | 308,025 one-year-olds | 115,761 one-year-olds | South Africa |
| 1990s | 233,446 one-year-olds | 265,731 one-year-olds | 32,284 one-year-olds | South Africa |
| 2000s | 313,047 one-year-olds | 232,420 one-year-olds | 80,627 one-year-olds | Chad |
| 2010s | 344,931 one-year-olds | 215,405 one-year-olds | 129,526 one-year-olds | Chad |
| 2020s | 262,024 one-year-olds | 195,522 one-year-olds | 66,502 one-year-olds | Chad |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus, Chad or South Africa?
- South Africa, at 251,724 one-year-olds against 242,358 one-year-olds in Chad as of 2023.
- What is the difference in number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus between Chad and South Africa?
- 9,366 one-year-olds, with South Africa ahead.
- How many years of comparable data are there for Chad and South Africa?
- 41 years are reported by both, from 1983 to 2023.
- How do Chad and South Africa rank globally for number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus?
- Chad ranks 20th and South Africa ranks 19th of 194 countries.
- Where does this data come from?
- WHO & UNICEF (2025); UN, World Population Prospects (2024) – processed by Our World in Data, published as Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
Number of one-year-olds who have not had three doses of the combined diphtheria, tetanus and pertussis vaccine in a given year.