Sierra Leone vs Zambia: Share of one-year-olds vaccinated against diphtheria, tetanus
Sierra Leone
91.0%
in 2025
Zambia
91.0%
in 2025
Sierra Leone rank
93rd
Zambia rank
93rd
Share of one-year-olds vaccinated against diphtheria, tetanus over time
- Sierra Leone
- Zambia
How they compare
Sierra Leone currently reports 91.0% against 91.0% in Zambia, a difference of 0.0%.
The two have swapped places 4 times across 27 shared years of data; in 1999 it was Zambia ahead.
Sierra Leone ranks 93rd and Zambia ranks 93rd of 195 countries.
Across the 4 decades both report, Sierra Leone averaged higher in 2 and Zambia in 2.
Head to head by decade
| Decade | Sierra Leone | Zambia | Difference | Ahead |
|---|---|---|---|---|
| 1990s | 43.0% | 84.0% | 41.0% | Zambia |
| 2000s | 62.7% | 84.4% | 21.7% | Zambia |
| 2010s | 88.9% | 86.4% | 2.5% | Sierra Leone |
| 2020s | 91.2% | 87.8% | 3.3% | Sierra Leone |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher share of one-year-olds vaccinated against diphtheria, tetanus and pertussis, Sierra Leone or Zambia?
- Sierra Leone, at 91.0% against 91.0% in Zambia as of 2025.
- What is the difference in share of one-year-olds vaccinated against diphtheria, tetanus and pertussis between Sierra Leone and Zambia?
- 0.0%, with Sierra Leone ahead.
- How many years of comparable data are there for Sierra Leone and Zambia?
- 27 years are reported by both, from 1999 to 2025.
- How do Sierra Leone and Zambia rank globally for share of one-year-olds vaccinated against diphtheria, tetanus and pertussis?
- Sierra Leone ranks 93rd and Zambia ranks 93rd of 195 countries.
- Where does this data come from?
- WHO & UNICEF (2026); UN, World Population Prospects (2024) – processed by Our World in Data, published as Share of one-year-olds vaccinated against diphtheria, tetanus and pertussis. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
Share of one-year-olds who have had three doses of the combined diphtheria, tetanus and pertussis vaccine in a given year.