Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus in Sao Tome and Principe
Sao Tome and Principe: Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus was 812.63 one-year-olds in 2023. ◆ Volatile
Latest (2023)
812.63 one-year-olds
Change on year
up 66.1%
World rank
156th
of 194 countries
All-time high
2,746 one-year-olds
in 1983
All-time low
59.16 one-year-olds
in 2008
Years of data
43
1981–2023
Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus 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
In 2023, number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus in Sao Tome and Principe stood at 812.63 one-year-olds.
That represents a change of up 66.1% on the previous year and up 344.9% over ten years.
Over the whole period, number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus in Sao Tome and Principe peaked at 2,746 one-year-olds in 1983 and was at its lowest, 59.16 one-year-olds, in 2008.
Sao Tome and Principe ranks 156th 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 diphtheria, pertussis and tetanus in Sao Tome and Principe, year by year
| Year | one-year-olds | Change |
|---|---|---|
| 1981 | 2,095 one-year-olds | — |
| 1982 | 2,418 one-year-olds | +15.4% |
| 1983 | 2,746 one-year-olds | +13.6% |
| 1984 | 1,922 one-year-olds | -30.0% |
| 1985 | 1,997 one-year-olds | +3.9% |
| 1986 | 1,374 one-year-olds | -31.2% |
| 1987 | 1,128 one-year-olds | -17.9% |
| 1988 | 953.58 one-year-olds | -15.4% |
| 1989 | 1,577 one-year-olds | +65.4% |
| 1990 | 349.6 one-year-olds | -77.8% |
| 1991 | 577.59 one-year-olds | +65.2% |
| 1992 | 1,446 one-year-olds | +150.4% |
| 1993 | 1,832 one-year-olds | +26.7% |
| 1994 | 778.6 one-year-olds | -57.5% |
| 1995 | 958.86 one-year-olds | +23.2% |
| 1996 | 1,458 one-year-olds | +52.0% |
| 1997 | 1,230 one-year-olds | -15.6% |
| 1998 | 1,225 one-year-olds | -0.4% |
| 1999 | 991.1 one-year-olds | -19.1% |
| 2000 | 805.68 one-year-olds | -18.7% |
| 2001 | 360.48 one-year-olds | -55.3% |
| 2002 | 396 one-year-olds | +9.9% |
| 2003 | 324.84 one-year-olds | -18.0% |
| 2004 | 220.32 one-year-olds | -32.2% |
| 2005 | 167.55 one-year-olds | -24.0% |
| 2006 | 170.64 one-year-olds | +1.8% |
| 2007 | 174.21 one-year-olds | +2.1% |
| 2008 | 59.16 one-year-olds | -66.0% |
| 2009 | 119.52 one-year-olds | +102.0% |
| 2010 | 119.36 one-year-olds | -0.1% |
| 2011 | 235.64 one-year-olds | +97.4% |
| 2012 | 232.24 one-year-olds | -1.4% |
| 2013 | 182.64 one-year-olds | -21.4% |
| 2014 | 318.7 one-year-olds | +74.5% |
| 2015 | 252.52 one-year-olds | -20.8% |
| 2016 | 248.76 one-year-olds | -1.5% |
| 2017 | 304.5 one-year-olds | +22.4% |
| 2018 | 297.95 one-year-olds | -2.2% |
| 2019 | 293.9 one-year-olds | -1.4% |
| 2020 | 238.4 one-year-olds | -18.9% |
| 2021 | 181.5 one-year-olds | -23.9% |
| 2022 | 489.36 one-year-olds | +169.6% |
| 2023 | 812.63 one-year-olds | +66.1% |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | 1,801 one-year-olds | 953.58 one-year-olds | 2,746 one-year-olds | 9 |
| 1990s | 1,085 one-year-olds | 349.6 one-year-olds | 1,832 one-year-olds | 10 |
| 2000s | 279.84 one-year-olds | 59.16 one-year-olds | 805.68 one-year-olds | 10 |
| 2010s | 248.62 one-year-olds | 119.36 one-year-olds | 318.7 one-year-olds | 10 |
| 2020s | 430.47 one-year-olds | 181.5 one-year-olds | 812.63 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 75-79, female, annual growth rate 0.7042 % change on previous year (2025)
- Population ages 75-79, female, per unit of GDP 0 units per US$ of GDP (2025)
- Population ages 75-79, female, per capita 0.0036 units per person (2025)
- Population ages 75-79, male, annual growth rate 2.03 % change on previous year (2025)
- Population ages 75-79, male, per unit of GDP 0 units per US$ of GDP (2025)
- Population ages 75-79, male, per capita 0.0027 units per person (2025)
Frequently asked questions
- What is number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus in Sao Tome and Principe?
- Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus 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 diphtheria, pertussis and tetanus recorded in Sao Tome and Principe?
- The highest recorded value was 2,746 one-year-olds in 1983.
- What is the lowest number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus recorded in Sao Tome and Principe?
- The lowest recorded value was 59.16 one-year-olds in 2008.
- How does Sao Tome and Principe rank for number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus?
- Sao Tome and Principe ranks 156th out of 194 countries with data for 2023.
- Is number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus rising or falling in Sao Tome and Principe?
- Over the last ten years it is up 344.9%. 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 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.