Share of one-year-olds vaccinated against diphtheria, tetanus in Samoa
Samoa: Share of one-year-olds vaccinated against diphtheria, tetanus was 84.0% in 2025. ▼ Falling
Share of one-year-olds vaccinated against diphtheria, tetanus and pertussis in Samoa, 1980–2025
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 Samoa is 84.0%, measured in 2025.
That represents a change of down 1.2% on the previous year and up 5.0% over ten years.
Over the whole period, share of one-year-olds vaccinated against diphtheria, tetanus and pertussis in Samoa peaked at 99.0% in 1998 and was at its lowest, 29.0%, in 1980.
That places Samoa 133rd out of 195 countries with data for 2025, putting it in the middle of the range.
The long-run direction has been consistently falling across the 46 years of available data.
Share of one-year-olds vaccinated against diphtheria, tetanus in Samoa, year by year
| Year | % | Change |
|---|---|---|
| 1980 | 29.0% | — |
| 1981 | 66.0% | +127.6% |
| 1982 | 87.0% | +31.8% |
| 1983 | 89.0% | +2.3% |
| 1984 | 96.0% | +7.9% |
| 1985 | 89.0% | -7.3% |
| 1986 | 94.0% | +5.6% |
| 1987 | 93.0% | -1.1% |
| 1988 | 90.0% | -3.2% |
| 1989 | 66.0% | -26.7% |
| 1990 | 90.0% | +36.4% |
| 1991 | 79.0% | -12.2% |
| 1992 | 91.0% | +15.2% |
| 1993 | 92.0% | +1.1% |
| 1994 | 93.0% | +1.1% |
| 1995 | 94.0% | +1.1% |
| 1996 | 95.0% | +1.1% |
| 1997 | 96.0% | +1.1% |
| 1998 | 99.0% | +3.1% |
| 1999 | 97.0% | -2.0% |
| 2000 | 98.0% | +1.0% |
| 2001 | 90.0% | -8.2% |
| 2002 | 92.0% | +2.2% |
| 2003 | 90.0% | -2.2% |
| 2004 | 63.0% | -30.0% |
| 2005 | 59.0% | -6.3% |
| 2006 | 50.0% | -15.3% |
| 2007 | 65.0% | +30.0% |
| 2008 | 39.0% | -40.0% |
| 2009 | 64.0% | +64.1% |
| 2010 | 78.0% | +21.9% |
| 2011 | 82.0% | +5.1% |
| 2012 | 82.0% | +0.0% |
| 2013 | 84.0% | +2.4% |
| 2014 | 78.0% | -7.1% |
| 2015 | 80.0% | +2.6% |
| 2016 | 74.0% | -7.5% |
| 2017 | 67.0% | -9.5% |
| 2018 | 44.0% | -34.3% |
| 2019 | 68.0% | +54.5% |
| 2020 | 89.0% | +30.9% |
| 2021 | 85.0% | -4.5% |
| 2022 | 76.0% | -10.6% |
| 2023 | 83.0% | +9.2% |
| 2024 | 85.0% | +2.4% |
| 2025 | 84.0% | -1.2% |
Samoa compared with similar countries
- Samoa's 84.0% is below the median for upper middle income countries, which is 91.0%, 92% of the median. (58 countries reporting)
- Samoa's 84.0% is below the median for East Asia & Pacific, which is 89.5%, 94% of the median. (30 countries reporting)
Biggest year-on-year movements
Years where Share of one-year-olds vaccinated against diphtheria, tetanus in Samoa 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 |
|---|---|---|---|
| 1981 | +127.6% | 29.0% | 66.0% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | 79.9% | 29.0% | 96.0% | 10 |
| 1990s | 92.6% | 79.0% | 99.0% | 10 |
| 2000s | 71.0% | 39.0% | 98.0% | 10 |
| 2010s | 73.7% | 44.0% | 84.0% | 10 |
| 2020s | 83.7% | 76.0% | 89.0% | 6 |
Countries ranked near Samoa
More reference data data for Samoa
- Emission Totals - Indirect emissions (N2O) - Manure applied to Soils 0.023 (2050)
- Emission Totals - Indirect emissions (N2O) - Manure left on Pasture 0.0165 (2050)
- Emission Totals - Indirect emissions (N2O) - IPCC Agriculture 0.0396 (2050)
- Emission Totals - Indirect emissions (N2O) - Agricultural Soils 0.0396 (2050)
- Emission Totals - Emissions (N2O) - Manure applied to Soils 0.077 (2050)
- Emission Totals - Emissions (N2O) - Manure Management 0.0626 (2050)
- Emission Totals - Emissions (N2O) - Manure left on Pasture 0.0918 (2050)
- Emission Totals - Emissions (N2O) - IPCC Agriculture 0.2319 (2050)
- Emission Totals - Emissions (N2O) - Burning - Crop residues 0 (2050)
- Emission Totals - Emissions (N2O) - Agricultural Soils 0.1693 (2050)
Frequently asked questions
- What is share of one-year-olds vaccinated against diphtheria, tetanus and pertussis in Samoa?
- Share of one-year-olds vaccinated against diphtheria, tetanus and pertussis in Samoa was 84.0% 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 Samoa?
- The highest recorded value was 99.0% in 1998.
- What is the lowest share of one-year-olds vaccinated against diphtheria, tetanus and pertussis recorded in Samoa?
- The lowest recorded value was 29.0% in 1980.
- How does Samoa rank for share of one-year-olds vaccinated against diphtheria, tetanus and pertussis?
- Samoa ranks 133rd out of 195 countries with data for 2025.
- Is share of one-year-olds vaccinated against diphtheria, tetanus and pertussis rising or falling in Samoa?
- Over the last ten years it is up 5.0%. The long-run trend across the full record is falling.
- Where does this Samoa 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.
Download this data
CSV · JSON — 46 observations, free to reuse under CC BY 4.0 (Our World in Data).
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.