Number of one-year-olds who are not fully vaccinated against in Samoa
Samoa: Number of one-year-olds who are not fully vaccinated against was 938.4 one-year-olds in 2023. ◆ Volatile
Number of one-year-olds who are not fully vaccinated against diphtheria, pertussis and tetanus in Samoa, 1980–2023
Source: WHO & UNICEF (2026); UN, World Population Prospects (2024) – processed by Our World in Data. Measured in one-year-olds.
Analysis
In 2023, number of one-year-olds who are not fully vaccinated against diphtheria, pertussis and tetanus in Samoa stood at 938.4 one-year-olds.
Compared with earlier readings it is down 31.2% on the previous year and down 0.8% over ten years.
Over the whole period, number of one-year-olds who are not fully vaccinated against diphtheria, pertussis and tetanus in Samoa peaked at 3,719 one-year-olds in 1980 and was at its lowest, 54.92 one-year-olds, in 1998.
That places Samoa 151st out of 195 countries with data for 2023, putting it in the bottom quarter.
The series is highly variable year to year, so single readings are best treated with caution.
Number of one-year-olds who are not fully vaccinated against in Samoa, year by year
| Year | one-year-olds | Change |
|---|---|---|
| 1980 | 3,719 one-year-olds | — |
| 1981 | 1,786 one-year-olds | -52.0% |
| 1982 | 683.93 one-year-olds | -61.7% |
| 1983 | 577.5 one-year-olds | -15.6% |
| 1984 | 210.2 one-year-olds | -63.6% |
| 1985 | 582.01 one-year-olds | +176.9% |
| 1986 | 324.84 one-year-olds | -44.2% |
| 1987 | 384.51 one-year-olds | +18.4% |
| 1988 | 539.6 one-year-olds | +40.3% |
| 1989 | 1,782 one-year-olds | +230.3% |
| 1990 | 517.1 one-year-olds | -71.0% |
| 1991 | 1,089 one-year-olds | +110.6% |
| 1992 | 470.79 one-year-olds | -56.8% |
| 1993 | 422.24 one-year-olds | -10.3% |
| 1994 | 369.74 one-year-olds | -12.4% |
| 1995 | 317.1 one-year-olds | -14.2% |
| 1996 | 269.05 one-year-olds | -15.2% |
| 1997 | 221.08 one-year-olds | -17.8% |
| 1998 | 54.92 one-year-olds | -75.2% |
| 1999 | 160.53 one-year-olds | +192.3% |
| 2000 | 107.92 one-year-olds | -32.8% |
| 2001 | 546.5 one-year-olds | +406.4% |
| 2002 | 439.36 one-year-olds | -19.6% |
| 2003 | 541 one-year-olds | +23.1% |
| 2004 | 1,950 one-year-olds | +260.4% |
| 2005 | 2,146 one-year-olds | +10.1% |
| 2006 | 2,621 one-year-olds | +22.1% |
| 2007 | 1,841 one-year-olds | -29.8% |
| 2008 | 3,249 one-year-olds | +76.5% |
| 2009 | 1,960 one-year-olds | -39.7% |
| 2010 | 1,229 one-year-olds | -37.3% |
| 2011 | 1,035 one-year-olds | -15.8% |
| 2012 | 1,057 one-year-olds | +2.1% |
| 2013 | 945.92 one-year-olds | -10.5% |
| 2014 | 1,298 one-year-olds | +37.2% |
| 2015 | 1,179 one-year-olds | -9.2% |
| 2016 | 1,529 one-year-olds | +29.7% |
| 2017 | 1,926 one-year-olds | +26.0% |
| 2018 | 3,263 one-year-olds | +69.4% |
| 2019 | 1,890 one-year-olds | -42.1% |
| 2020 | 653.18 one-year-olds | -65.4% |
| 2021 | 876.15 one-year-olds | +34.1% |
| 2022 | 1,363 one-year-olds | +55.6% |
| 2023 | 938.4 one-year-olds | -31.2% |
Samoa compared with similar countries
- Samoa's 938.4 one-year-olds is below the median for upper middle income countries, which is 4,976 one-year-olds, 19% of the median. (58 countries reporting)
- Samoa's 938.4 one-year-olds is below the median for East Asia & Pacific, which is 4,252 one-year-olds, 22% of the median. (30 countries reporting)
Biggest year-on-year movements
Years where Number of one-year-olds who are not fully vaccinated against 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 |
|---|---|---|---|
| 2001 | +406.4% | 107.92 one-year-olds | 546.5 one-year-olds |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | 1,059 one-year-olds | 210.2 one-year-olds | 3,719 one-year-olds | 10 |
| 1990s | 389.18 one-year-olds | 54.92 one-year-olds | 1,089 one-year-olds | 10 |
| 2000s | 1,540 one-year-olds | 107.92 one-year-olds | 3,249 one-year-olds | 10 |
| 2010s | 1,535 one-year-olds | 945.92 one-year-olds | 3,263 one-year-olds | 10 |
| 2020s | 957.73 one-year-olds | 653.18 one-year-olds | 1,363 one-year-olds | 4 |
Countries ranked near Samoa
More health data for Samoa
- Un projection of annual infant deaths, annual growth rate 0 % change on previous year (2100)
- Heat deaths vs projected death rates, annual growth rate 1.71 % change on previous year (2090)
- Number of infants who die before age 1 17 deaths (2100)
- Neonatal tetanus - number of reported cases, gaps filled 1 (2025)
- Population ages 00-04, female, annual growth rate -2.45 % change on previous year (2025)
- Population ages 00-04, female, per unit of GDP 0 units per US$ of GDP (2025)
- Population ages 00-04, female, per capita 0.0591 units per person (2025)
- Population ages 00-04, male, annual growth rate -2.5 % change on previous year (2025)
- Population ages 00-04, male, per unit of GDP 0 units per US$ of GDP (2025)
- Population ages 00-04, male, per capita 0.0634 units per person (2025)
Frequently asked questions
- What is number of one-year-olds who are not fully vaccinated against diphtheria, pertussis and tetanus in Samoa?
- Number of one-year-olds who are not fully vaccinated against diphtheria, pertussis and tetanus in Samoa was 938.4 one-year-olds in 2023, according to WHO & UNICEF (2026); UN, World Population Prospects (2024) – processed by Our World in Data.
- What is the highest number of one-year-olds who are not fully vaccinated against diphtheria, pertussis and tetanus recorded in Samoa?
- The highest recorded value was 3,719 one-year-olds in 1980.
- What is the lowest number of one-year-olds who are not fully vaccinated against diphtheria, pertussis and tetanus recorded in Samoa?
- The lowest recorded value was 54.92 one-year-olds in 1998.
- How does Samoa rank for number of one-year-olds who are not fully vaccinated against diphtheria, pertussis and tetanus?
- Samoa ranks 151st out of 195 countries with data for 2023.
- Is number of one-year-olds who are not fully vaccinated against diphtheria, pertussis and tetanus rising or falling in Samoa?
- Over the last ten years it is down 0.8%. The long-run trend across the full record is volatile.
- 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 Number of one-year-olds who are not fully vaccinated against diphtheria, pertussis and tetanus. Statizoid updates them automatically from the source API.
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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.