Number of one-year-olds who are not vaccinated against measles in Sao Tome and Principe
Sao Tome and Principe: Number of one-year-olds who are not vaccinated against measles was 812.63 one-year-olds in 2023. ◆ Volatile
Latest (2023)
812.63 one-year-olds
Change on year
down 26.2%
World rank
157th
of 194 countries
All-time high
2,709 one-year-olds
in 1981
All-time low
293.9 one-year-olds
in 2019
Years of data
43
1981–2023
Number of one-year-olds who are not vaccinated against measles in Sao Tome and Principe, 1981–2023
Source: WHO & UNICEF (2025); UN, World Population Prospects (2024) – processed by Our World in Data. Measured in one-year-olds.
Analysis
Sao Tome and Principe recorded 812.63 one-year-olds for number of one-year-olds who are not vaccinated against measles in 2023.
That represents a change of down 26.2% on the previous year and up 48.3% over ten years.
Over the whole period, number of one-year-olds who are not vaccinated against measles in Sao Tome and Principe peaked at 2,709 one-year-olds in 1981 and was at its lowest, 293.9 one-year-olds, in 2019.
Sao Tome and Principe ranks 157th 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 measles in Sao Tome and Principe, year by year
| Year | one-year-olds | Change |
|---|---|---|
| 1981 | 2,709 one-year-olds | — |
| 1982 | 2,492 one-year-olds | -8.0% |
| 1983 | 2,227 one-year-olds | -10.6% |
| 1984 | 1,960 one-year-olds | -12.0% |
| 1985 | 2,497 one-year-olds | +27.4% |
| 1986 | 1,649 one-year-olds | -34.0% |
| 1987 | 1,248 one-year-olds | -24.3% |
| 1988 | 1,285 one-year-olds | +3.0% |
| 1989 | 2,345 one-year-olds | +82.4% |
| 1990 | 1,267 one-year-olds | -45.9% |
| 1991 | 1,022 one-year-olds | -19.4% |
| 1992 | 2,169 one-year-olds | +112.3% |
| 1993 | 1,969 one-year-olds | -9.2% |
| 1994 | 1,603 one-year-olds | -18.6% |
| 1995 | 1,187 one-year-olds | -25.9% |
| 1996 | 1,959 one-year-olds | +65.0% |
| 1997 | 1,822 one-year-olds | -7.0% |
| 1998 | 1,860 one-year-olds | +2.1% |
| 1999 | 1,622 one-year-olds | -12.8% |
| 2000 | 1,388 one-year-olds | -14.4% |
| 2001 | 1,126 one-year-olds | -18.8% |
| 2002 | 742.5 one-year-olds | -34.1% |
| 2003 | 703.82 one-year-olds | -5.2% |
| 2004 | 495.72 one-year-olds | -29.6% |
| 2005 | 670.2 one-year-olds | +35.2% |
| 2006 | 853.2 one-year-olds | +27.3% |
| 2007 | 812.98 one-year-olds | -4.7% |
| 2008 | 414.12 one-year-olds | -49.1% |
| 2009 | 597.6 one-year-olds | +44.3% |
| 2010 | 477.44 one-year-olds | -20.1% |
| 2011 | 530.19 one-year-olds | +11.0% |
| 2012 | 464.48 one-year-olds | -12.4% |
| 2013 | 547.92 one-year-olds | +18.0% |
| 2014 | 509.92 one-year-olds | -6.9% |
| 2015 | 441.91 one-year-olds | -13.3% |
| 2016 | 435.33 one-year-olds | -1.5% |
| 2017 | 609 one-year-olds | +39.9% |
| 2018 | 297.95 one-year-olds | -51.1% |
| 2019 | 293.9 one-year-olds | -1.4% |
| 2020 | 834.4 one-year-olds | +183.9% |
| 2021 | 1,392 one-year-olds | +66.8% |
| 2022 | 1,101 one-year-olds | -20.9% |
| 2023 | 812.63 one-year-olds | -26.2% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | 2,046 one-year-olds | 1,248 one-year-olds | 2,709 one-year-olds | 9 |
| 1990s | 1,648 one-year-olds | 1,022 one-year-olds | 2,169 one-year-olds | 10 |
| 2000s | 780.42 one-year-olds | 414.12 one-year-olds | 1,388 one-year-olds | 10 |
| 2010s | 460.8 one-year-olds | 293.9 one-year-olds | 609 one-year-olds | 10 |
| 2020s | 1,035 one-year-olds | 812.63 one-year-olds | 1,392 one-year-olds | 4 |
Countries ranked near Sao Tome and Principe
More health data for Sao Tome and Principe
- Un projection of annual infant deaths, annual growth rate -6.25 % change on previous year (2100)
- Heat deaths vs projected death rates, annual growth rate 1.35 % change on previous year (2090)
- Estimated changes in temperature-related death rates compared to projected death rates 793.5 deaths per 1,000 people (2090)
- Number of infants who die before age 1 15 deaths (2100)
- Population ages 80 and above, female, per capita 0.0046 units per person (2025)
- Population ages 80 and above, male, annual growth rate -0.813 % change on previous year (2025)
- Population ages 80 and above, male, per unit of GDP 0 units per US$ of GDP (2025)
- Population ages 80 and above, male, per capita 0.0025 units per person (2025)
- Pertussis - number of reported cases, gaps filled 0 (2021)
- Pertussis - number of reported cases, per capita 0 units per person (2021)
Frequently asked questions
- What is number of one-year-olds who are not vaccinated against measles in Sao Tome and Principe?
- Number of one-year-olds who are not vaccinated against measles in Sao Tome and Principe was 812.63 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 measles recorded in Sao Tome and Principe?
- The highest recorded value was 2,709 one-year-olds in 1981.
- What is the lowest number of one-year-olds who are not vaccinated against measles recorded in Sao Tome and Principe?
- The lowest recorded value was 293.9 one-year-olds in 2019.
- How does Sao Tome and Principe rank for number of one-year-olds who are not vaccinated against measles?
- Sao Tome and Principe ranks 157th out of 194 countries with data for 2023.
- Is number of one-year-olds who are not vaccinated against measles rising or falling in Sao Tome and Principe?
- Over the last ten years it is up 48.3%. The long-run trend across the full record is volatile.
- Where does this Sao Tome and Principe 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 measles. 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 first dose of the measles vaccine in a given year.