Share of one-year-olds vaccinated against diphtheria, tetanus in Sierra Leone
Sierra Leone: Share of one-year-olds vaccinated against diphtheria, tetanus was 91.0% in 2025. ▲ Rising
Share of one-year-olds vaccinated against diphtheria, tetanus and pertussis in Sierra Leone, 1999–2025
Source: WHO & UNICEF (2026); UN, World Population Prospects (2024) – processed by Our World in Data. Measured in %.
Analysis
The most recent figure for share of one-year-olds vaccinated against diphtheria, tetanus and pertussis in Sierra Leone is 91.0%, measured in 2025.
That represents a change of up 5.8% over ten years.
Over the whole period, share of one-year-olds vaccinated against diphtheria, tetanus and pertussis in Sierra Leone peaked at 95.0% in 2019 and was at its lowest, 38.0%, in 2001.
That places Sierra Leone 93rd out of 195 countries with data for 2025, putting it in the middle of the range.
The long-run direction has been consistently rising across the 27 years of available data.
Share of one-year-olds vaccinated against diphtheria, tetanus in Sierra Leone, year by year
| Year | % | Change |
|---|---|---|
| 1999 | 43.0% | — |
| 2000 | 44.0% | +2.3% |
| 2001 | 38.0% | -13.6% |
| 2002 | 53.0% | +39.5% |
| 2003 | 73.0% | +37.7% |
| 2004 | 65.0% | -11.0% |
| 2005 | 65.0% | +0.0% |
| 2006 | 64.0% | -1.5% |
| 2007 | 64.0% | +0.0% |
| 2008 | 77.0% | +20.3% |
| 2009 | 84.0% | +9.1% |
| 2010 | 86.0% | +2.4% |
| 2011 | 89.0% | +3.5% |
| 2012 | 91.0% | +2.2% |
| 2013 | 92.0% | +1.1% |
| 2014 | 83.0% | -9.8% |
| 2015 | 86.0% | +3.6% |
| 2016 | 84.0% | -2.3% |
| 2017 | 90.0% | +7.1% |
| 2018 | 93.0% | +3.3% |
| 2019 | 95.0% | +2.2% |
| 2020 | 91.0% | -4.2% |
| 2021 | 92.0% | +1.1% |
| 2022 | 91.0% | -1.1% |
| 2023 | 91.0% | +0.0% |
| 2024 | 91.0% | +0.0% |
| 2025 | 91.0% | +0.0% |
Sierra Leone compared with similar countries
- Sierra Leone's 91.0% is above the median for low income countries, which is 82.0%, 1.1× the median. (25 countries reporting)
- Sierra Leone's 91.0% is above the median for Sub-Saharan Africa, which is 84.0%, 1.1× the median. (48 countries reporting)
Biggest year-on-year movements
Years where Share of one-year-olds vaccinated against diphtheria, tetanus in Sierra Leone 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 |
|---|---|---|---|
| 2002 | +39.5% | 38.0% | 53.0% |
| 2003 | +37.7% | 53.0% | 73.0% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1990s | 43.0% | 43.0% | 43.0% | 1 |
| 2000s | 62.7% | 38.0% | 84.0% | 10 |
| 2010s | 88.9% | 83.0% | 95.0% | 10 |
| 2020s | 91.2% | 91.0% | 92.0% | 6 |
Countries ranked near Sierra Leone
More reference data data for Sierra Leone
- Emission Totals - Indirect emissions (N2O) - Manure applied to Soils 0.0238 (2050)
- Emission Totals - Indirect emissions (N2O) - Manure left on Pasture 0.4498 (2050)
- Emission Totals - Indirect emissions (N2O) - IPCC Agriculture 0.5935 (2050)
- Emission Totals - Indirect emissions (N2O) - Crop Residues 0.12 (2050)
- Emission Totals - Indirect emissions (N2O) - Agricultural Soils 0.5935 (2050)
- Emission Totals - Emissions (N2O) - Manure applied to Soils 0.0797 (2050)
- Emission Totals - Emissions (N2O) - Manure Management 0.044 (2050)
- Emission Totals - Emissions (N2O) - Manure left on Pasture 1.91 (2050)
- Emission Totals - Emissions (N2O) - IPCC Agriculture 2.72 (2050)
- Emission Totals - Emissions (N2O) - Crop Residues 0.6534 (2050)
Frequently asked questions
- What is share of one-year-olds vaccinated against diphtheria, tetanus and pertussis in Sierra Leone?
- Share of one-year-olds vaccinated against diphtheria, tetanus and pertussis in Sierra Leone was 91.0% in 2025, according to WHO & UNICEF (2026); UN, World Population Prospects (2024) – processed by Our World in Data.
- What is the highest share of one-year-olds vaccinated against diphtheria, tetanus and pertussis recorded in Sierra Leone?
- The highest recorded value was 95.0% in 2019.
- What is the lowest share of one-year-olds vaccinated against diphtheria, tetanus and pertussis recorded in Sierra Leone?
- The lowest recorded value was 38.0% in 2001.
- How does Sierra Leone rank for share of one-year-olds vaccinated against diphtheria, tetanus and pertussis?
- Sierra Leone ranks 93rd out of 195 countries with data for 2025.
- Is share of one-year-olds vaccinated against diphtheria, tetanus and pertussis rising or falling in Sierra Leone?
- Over the last ten years it is up 5.8%. The long-run trend across the full record is rising.
- Where does this Sierra Leone data come from?
- The figures come from WHO & UNICEF (2026); UN, World Population Prospects (2024) – processed by Our World in Data, published as part of Share of one-year-olds vaccinated against diphtheria, tetanus and pertussis. Statizoid updates them automatically from the source API.
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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.