Number of one-year-olds who are not vaccinated against polio in Samoa
Samoa: Number of one-year-olds who are not vaccinated against polio was 883.2 one-year-olds in 2023. ◆ Volatile
Number of one-year-olds who are not vaccinated against polio in Samoa, 1980–2023
Source: WHO & UNICEF (2025); UN, World Population Prospects (2024) – processed by Our World in Data. Measured in one-year-olds.
Analysis
The most recent figure for number of one-year-olds who are not vaccinated against polio in Samoa is 883.2 one-year-olds, measured in 2023.
Compared with earlier readings it is down 35.2% on the previous year and down 21.4% over ten years.
Over the whole period, number of one-year-olds who are not vaccinated against polio in Samoa peaked at 3,719 one-year-olds in 1980 and was at its lowest, 54.92 one-year-olds, in 1998.
Samoa ranks 152nd of 194 countries on this measure, 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 vaccinated against polio 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 | 423.28 one-year-olds | +101.4% |
| 1986 | 324.84 one-year-olds | -23.3% |
| 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 | 620.52 one-year-olds | -65.2% |
| 1991 | 1,089 one-year-olds | +75.5% |
| 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 | 55.27 one-year-olds | -79.5% |
| 1998 | 54.92 one-year-olds | -0.6% |
| 1999 | 160.53 one-year-olds | +192.3% |
| 2000 | 107.92 one-year-olds | -32.8% |
| 2001 | 655.8 one-year-olds | +507.7% |
| 2002 | 494.28 one-year-olds | -24.6% |
| 2003 | 541 one-year-olds | +9.5% |
| 2004 | 3,425 one-year-olds | +533.1% |
| 2005 | 1,780 one-year-olds | -48.0% |
| 2006 | 2,673 one-year-olds | +50.2% |
| 2007 | 1,946 one-year-olds | -27.2% |
| 2008 | 1,651 one-year-olds | -15.2% |
| 2009 | 2,124 one-year-olds | +28.6% |
| 2010 | 1,452 one-year-olds | -31.6% |
| 2011 | 1,208 one-year-olds | -16.8% |
| 2012 | 1,057 one-year-olds | -12.5% |
| 2013 | 1,123 one-year-olds | +6.3% |
| 2014 | 1,416 one-year-olds | +26.1% |
| 2015 | 1,297 one-year-olds | -8.4% |
| 2016 | 1,588 one-year-olds | +22.5% |
| 2017 | 1,985 one-year-olds | +25.0% |
| 2018 | 3,263 one-year-olds | +64.4% |
| 2019 | 1,890 one-year-olds | -42.1% |
| 2020 | 653.18 one-year-olds | -65.4% |
| 2021 | 1,168 one-year-olds | +78.8% |
| 2022 | 1,363 one-year-olds | +16.7% |
| 2023 | 883.2 one-year-olds | -35.2% |
Samoa compared with similar countries
- Samoa's 883.2 one-year-olds is below the median for upper middle income countries, which is 4,188 one-year-olds, 21% of the median. (58 countries reporting)
- Samoa's 883.2 one-year-olds is below the median for East Asia & Pacific, which is 6,080 one-year-olds, 15% of the median. (30 countries reporting)
Biggest year-on-year movements
Years where Number of one-year-olds who are not vaccinated against polio 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 |
|---|---|---|---|
| 2004 | +533.1% | 541 one-year-olds | 3,425 one-year-olds |
| 2001 | +507.7% | 107.92 one-year-olds | 655.8 one-year-olds |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | 1,043 one-year-olds | 210.2 one-year-olds | 3,719 one-year-olds | 10 |
| 1990s | 382.94 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 | 3,425 one-year-olds | 10 |
| 2010s | 1,628 one-year-olds | 1,057 one-year-olds | 3,263 one-year-olds | 10 |
| 2020s | 1,017 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)
- Estimated changes in temperature-related death rates compared to projected death rates 708.7 deaths per 1,000 people (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)
Frequently asked questions
- What is number of one-year-olds who are not vaccinated against polio in Samoa?
- Number of one-year-olds who are not vaccinated against polio in Samoa was 883.2 one-year-olds in 2023, according to WHO & UNICEF (2025); UN, World Population Prospects (2024) – processed by Our World in Data.
- What is the highest number of one-year-olds who are not vaccinated against polio 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 vaccinated against polio 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 vaccinated against polio?
- Samoa ranks 152nd out of 194 countries with data for 2023.
- Is number of one-year-olds who are not vaccinated against polio rising or falling in Samoa?
- Over the last ten years it is down 21.4%. The long-run trend across the full record is volatile.
- Where does this Samoa data come from?
- The figures come from WHO & UNICEF (2025); UN, World Population Prospects (2024) – processed by Our World in Data, published as part of Number of one-year-olds who are not vaccinated against polio. Statizoid updates them automatically from the source API.
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About this data
Number of one-year-olds who have not had the third dose of either the oral or inactivated polio vaccine in a given year.