Number of one-year-olds who are not fully vaccinated against in Cook Islands
Cook Islands: Number of one-year-olds who are not fully vaccinated against was 26.32 one-year-olds in 2023. ◆ Volatile
Number of one-year-olds who are not fully vaccinated against diphtheria, pertussis and tetanus in Cook Islands, 1980–2023
Source: WHO & UNICEF (2026); UN, World Population Prospects (2024) – processed by Our World in Data. Measured in one-year-olds.
Analysis
Cook Islands recorded 26.32 one-year-olds for number of one-year-olds who are not fully vaccinated against diphtheria, pertussis and tetanus in 2023.
That represents a change of down 53.9% on the previous year and up 330.1% over ten years.
Over the whole period, number of one-year-olds who are not fully vaccinated against diphtheria, pertussis and tetanus in Cook Islands peaked at 269.4 one-year-olds in 1980 and was at its lowest, 2.48 one-year-olds, in 2018.
Cook Islands ranks 187th of 195 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 fully vaccinated against in Cook Islands, year by year
| Year | one-year-olds | Change |
|---|---|---|
| 1980 | 269.4 one-year-olds | — |
| 1981 | 239.76 one-year-olds | -11.0% |
| 1982 | 215.6 one-year-olds | -10.1% |
| 1983 | 186.62 one-year-olds | -13.4% |
| 1984 | 219.96 one-year-olds | +17.9% |
| 1985 | 90.86 one-year-olds | -58.7% |
| 1986 | 53.56 one-year-olds | -41.1% |
| 1987 | 70.89 one-year-olds | +32.4% |
| 1988 | 26.16 one-year-olds | -63.1% |
| 1989 | 50.05 one-year-olds | +91.3% |
| 1990 | 32.69 one-year-olds | -34.7% |
| 1991 | 62.53 one-year-olds | +91.3% |
| 1992 | 64.09 one-year-olds | +2.5% |
| 1993 | 4.97 one-year-olds | -92.2% |
| 1994 | 68.88 one-year-olds | +1285.9% |
| 1995 | 34.09 one-year-olds | -50.5% |
| 1996 | 121.25 one-year-olds | +255.7% |
| 1997 | 33.39 one-year-olds | -72.5% |
| 1998 | 30.38 one-year-olds | -9.0% |
| 1999 | 30.24 one-year-olds | -0.5% |
| 2000 | 27.52 one-year-olds | -9.0% |
| 2001 | 32 one-year-olds | +16.3% |
| 2002 | 9.09 one-year-olds | -71.6% |
| 2003 | 12.04 one-year-olds | +32.5% |
| 2004 | 3.04 one-year-olds | -74.8% |
| 2005 | 3.02 one-year-olds | -0.7% |
| 2006 | 3.05 one-year-olds | +1.0% |
| 2007 | 3.09 one-year-olds | +1.3% |
| 2008 | 3.09 one-year-olds | +0.0% |
| 2009 | 55.62 one-year-olds | +1700.0% |
| 2010 | 3.14 one-year-olds | -94.4% |
| 2011 | 22.26 one-year-olds | +608.9% |
| 2012 | 6.36 one-year-olds | -71.4% |
| 2013 | 6.12 one-year-olds | -3.8% |
| 2014 | 2.91 one-year-olds | -52.5% |
| 2015 | 2.81 one-year-olds | -3.4% |
| 2016 | 2.69 one-year-olds | -4.3% |
| 2017 | 2.56 one-year-olds | -4.8% |
| 2018 | 2.48 one-year-olds | -3.1% |
| 2019 | 4.82 one-year-olds | +94.4% |
| 2020 | 25.41 one-year-olds | +427.2% |
| 2021 | 41.61 one-year-olds | +63.8% |
| 2022 | 57.12 one-year-olds | +37.3% |
| 2023 | 26.32 one-year-olds | -53.9% |
Biggest year-on-year movements
Years where Number of one-year-olds who are not fully vaccinated against in Cook Islands 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 |
|---|---|---|---|
| 2009 | +1700.0% | 3.09 one-year-olds | 55.62 one-year-olds |
| 1994 | +1285.9% | 4.97 one-year-olds | 68.88 one-year-olds |
| 2011 | +608.9% | 3.14 one-year-olds | 22.26 one-year-olds |
| 2020 | +427.2% | 4.82 one-year-olds | 25.41 one-year-olds |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | 142.29 one-year-olds | 26.16 one-year-olds | 269.4 one-year-olds | 10 |
| 1990s | 48.25 one-year-olds | 4.97 one-year-olds | 121.25 one-year-olds | 10 |
| 2000s | 15.16 one-year-olds | 3.02 one-year-olds | 55.62 one-year-olds | 10 |
| 2010s | 5.62 one-year-olds | 2.48 one-year-olds | 22.26 one-year-olds | 10 |
| 2020s | 37.62 one-year-olds | 25.41 one-year-olds | 57.12 one-year-olds | 4 |
Countries ranked near Cook Islands
- 184 Seychelles 54.12 one-year-olds compare
- 185 Nauru 46.35 one-year-olds compare
- 186 Antigua and Barbuda 33.27 one-year-olds compare
- 188 Tonga 23.98 one-year-olds compare
- 189 Saint Kitts and Nevis 22.36 one-year-olds compare
- 190 San Marino 19.89 one-year-olds compare
More health data for Cook Islands
- Number of infants who die before age 1 0 deaths (2100)
- Heat deaths vs projected death rates, annual growth rate 1.79 % change on previous year (2090)
- Un projection of annual infant deaths, annual growth rate -100 % change on previous year (2029)
- Total tetanus - number of reported cases, gaps filled 0 (2019)
- Neonatal tetanus - number of reported cases, gaps filled 0 (2019)
- Measles - number of reported cases, gaps filled 0 (2019)
- Diphtheria - number of reported cases, gaps filled 0 (2019)
- Vaccination coverage vs. share in extreme poverty 95.0% (2025)
- Vaccination against DTP vs. perception of the safety of vaccines 95.0% (2025)
- Vaccination coverage vs. GDP per capita 95.0% (2025)
Frequently asked questions
- What is number of one-year-olds who are not fully vaccinated against diphtheria, pertussis and tetanus in Cook Islands?
- Number of one-year-olds who are not fully vaccinated against diphtheria, pertussis and tetanus in Cook Islands was 26.32 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 Cook Islands?
- The highest recorded value was 269.4 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 Cook Islands?
- The lowest recorded value was 2.48 one-year-olds in 2018.
- How does Cook Islands rank for number of one-year-olds who are not fully vaccinated against diphtheria, pertussis and tetanus?
- Cook Islands ranks 187th 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 Cook Islands?
- Over the last ten years it is up 330.1%. The long-run trend across the full record is volatile.
- Where does this Cook Islands 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.
Download this data
CSV · JSON — 44 observations, free to reuse under CC BY 4.0 (Our World in Data).
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.