Share of one-year-olds vaccinated against diphtheria, tetanus in Tonga
Tonga: Share of one-year-olds vaccinated against diphtheria, tetanus was 94.0% in 2025. ▲ Rising
Share of one-year-olds vaccinated against diphtheria, tetanus and pertussis in Tonga, 1980–2025
Source: WHO & UNICEF (2026); UN, World Population Prospects (2024) – processed by Our World in Data. Measured in %.
Analysis
In 2025, share of one-year-olds vaccinated against diphtheria, tetanus and pertussis in Tonga stood at 94.0%.
The figure is down 5.1% on the previous year and down 2.1% over ten years.
Over the whole period, share of one-year-olds vaccinated against diphtheria, tetanus and pertussis in Tonga peaked at 99.0% in 1987 and was at its lowest, 37.0%, in 1981.
Tonga ranks 73rd of 195 countries on this measure, in the middle of the range.
The long-run direction has been consistently rising across the 46 years of available data.
Share of one-year-olds vaccinated against diphtheria, tetanus in Tonga, year by year
| Year | % | Change |
|---|---|---|
| 1980 | 40.0% | — |
| 1981 | 37.0% | -7.5% |
| 1982 | 52.0% | +40.5% |
| 1983 | 63.0% | +21.2% |
| 1984 | 51.0% | -19.0% |
| 1985 | 92.0% | +80.4% |
| 1986 | 75.0% | -18.5% |
| 1987 | 99.0% | +32.0% |
| 1988 | 92.0% | -7.1% |
| 1989 | 93.0% | +1.1% |
| 1990 | 94.0% | +1.1% |
| 1991 | 88.0% | -6.4% |
| 1992 | 99.0% | +12.5% |
| 1993 | 96.0% | -3.0% |
| 1994 | 89.0% | -7.3% |
| 1995 | 95.0% | +6.7% |
| 1996 | 99.0% | +4.2% |
| 1997 | 96.0% | -3.0% |
| 1998 | 97.0% | +1.0% |
| 1999 | 94.0% | -3.1% |
| 2000 | 95.0% | +1.1% |
| 2001 | 94.0% | -1.1% |
| 2002 | 90.0% | -4.3% |
| 2003 | 98.0% | +8.9% |
| 2004 | 99.0% | +1.0% |
| 2005 | 99.0% | +0.0% |
| 2006 | 99.0% | +0.0% |
| 2007 | 99.0% | +0.0% |
| 2008 | 99.0% | +0.0% |
| 2009 | 99.0% | +0.0% |
| 2010 | 99.0% | +0.0% |
| 2011 | 99.0% | +0.0% |
| 2012 | 95.0% | -4.0% |
| 2013 | 99.0% | +4.2% |
| 2014 | 98.0% | -1.0% |
| 2015 | 96.0% | -2.0% |
| 2016 | 96.0% | +0.0% |
| 2017 | 99.0% | +3.1% |
| 2018 | 99.0% | +0.0% |
| 2019 | 99.0% | +0.0% |
| 2020 | 99.0% | +0.0% |
| 2021 | 99.0% | +0.0% |
| 2022 | 99.0% | +0.0% |
| 2023 | 99.0% | +0.0% |
| 2024 | 99.0% | +0.0% |
| 2025 | 94.0% | -5.1% |
Tonga compared with similar countries
- Tonga's 94.0% is above the median for upper middle income countries, which is 91.0%, 1.0× the median. (58 countries reporting)
- Tonga's 94.0% is above the median for East Asia & Pacific, which is 89.5%, 1.1× the median. (30 countries reporting)
Biggest year-on-year movements
Years where Share of one-year-olds vaccinated against diphtheria, tetanus in Tonga 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 |
|---|---|---|---|
| 1985 | +80.4% | 51.0% | 92.0% |
| 1982 | +40.5% | 37.0% | 52.0% |
| 1987 | +32.0% | 75.0% | 99.0% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | 69.4% | 37.0% | 99.0% | 10 |
| 1990s | 94.7% | 88.0% | 99.0% | 10 |
| 2000s | 97.1% | 90.0% | 99.0% | 10 |
| 2010s | 97.9% | 95.0% | 99.0% | 10 |
| 2020s | 98.2% | 94.0% | 99.0% | 6 |
Countries ranked near Tonga
More reference data data for Tonga
- Emission Totals - Indirect emissions (N2O) - Manure applied to Soils 0.0105 (2050)
- Emission Totals - Indirect emissions (N2O) - Manure left on Pasture 0.0092 (2050)
- Emission Totals - Indirect emissions (N2O) - IPCC Agriculture 0.0197 (2050)
- Emission Totals - Indirect emissions (N2O) - Agricultural Soils 0.0197 (2050)
- Emission Totals - Emissions (N2O) - Manure applied to Soils 0.0353 (2050)
- Emission Totals - Emissions (N2O) - Manure Management 0.0269 (2050)
- Emission Totals - Emissions (N2O) - Manure left on Pasture 0.0446 (2050)
- Emission Totals - Emissions (N2O) - IPCC Agriculture 0.1068 (2050)
- Emission Totals - Emissions (N2O) - Agricultural Soils 0.0799 (2050)
- Emission Totals - Emissions (CO2eq) from N2O (AR5) - Manure applied 9.35 (2050)
Frequently asked questions
- What is share of one-year-olds vaccinated against diphtheria, tetanus and pertussis in Tonga?
- Share of one-year-olds vaccinated against diphtheria, tetanus and pertussis in Tonga was 94.0% 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 Tonga?
- The highest recorded value was 99.0% in 1987.
- What is the lowest share of one-year-olds vaccinated against diphtheria, tetanus and pertussis recorded in Tonga?
- The lowest recorded value was 37.0% in 1981.
- How does Tonga rank for share of one-year-olds vaccinated against diphtheria, tetanus and pertussis?
- Tonga ranks 73rd out of 195 countries with data for 2025.
- Is share of one-year-olds vaccinated against diphtheria, tetanus and pertussis rising or falling in Tonga?
- Over the last ten years it is down 2.1%. The long-run trend across the full record is rising.
- Where does this Tonga 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.