Number of one-year-olds who are not vaccinated against diphtheria in Sao Tome and Principe
Sao Tome and Principe: Number of one-year-olds who are not vaccinated against diphtheria was 0.8465 one-year-olds per square kilometre in 2023. ◆ Volatile
Number of one-year-olds who are not vaccinated against diphtheria in Sao Tome and Principe, 1981–2023
Source: Statizoid (derived). Measured in one-year-olds per square kilometre.
Analysis
In 2023, number of one-year-olds who are not vaccinated against diphtheria in Sao Tome and Principe stood at 0.8465 one-year-olds per square kilometre.
Compared with earlier readings it is 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 in Sao Tome and Principe peaked at 2.86 one-year-olds per square kilometre in 1983 and was at its lowest, 0.0616 one-year-olds per square kilometre, in 2008.
That places Sao Tome and Principe 19th out of 192 countries with data for 2023, putting it in the top 10%.
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 in Sao Tome and Principe, year by year
| Year | one-year-olds per square kilometre | Change |
|---|---|---|
| 1981 | 2.18 one-year-olds per square kilometre | — |
| 1982 | 2.52 one-year-olds per square kilometre | +15.4% |
| 1983 | 2.86 one-year-olds per square kilometre | +13.6% |
| 1984 | 2 one-year-olds per square kilometre | -30.0% |
| 1985 | 2.08 one-year-olds per square kilometre | +3.9% |
| 1986 | 1.43 one-year-olds per square kilometre | -31.2% |
| 1987 | 1.17 one-year-olds per square kilometre | -17.9% |
| 1988 | 0.9933 one-year-olds per square kilometre | -15.4% |
| 1989 | 1.64 one-year-olds per square kilometre | +65.4% |
| 1990 | 0.3642 one-year-olds per square kilometre | -77.8% |
| 1991 | 0.6017 one-year-olds per square kilometre | +65.2% |
| 1992 | 1.51 one-year-olds per square kilometre | +150.4% |
| 1993 | 1.91 one-year-olds per square kilometre | +26.7% |
| 1994 | 0.811 one-year-olds per square kilometre | -57.5% |
| 1995 | 0.9988 one-year-olds per square kilometre | +23.2% |
| 1996 | 1.52 one-year-olds per square kilometre | +52.0% |
| 1997 | 1.28 one-year-olds per square kilometre | -15.6% |
| 1998 | 1.28 one-year-olds per square kilometre | -0.4% |
| 1999 | 1.03 one-year-olds per square kilometre | -19.1% |
| 2000 | 0.8393 one-year-olds per square kilometre | -18.7% |
| 2001 | 0.3755 one-year-olds per square kilometre | -55.3% |
| 2002 | 0.4125 one-year-olds per square kilometre | +9.9% |
| 2003 | 0.3384 one-year-olds per square kilometre | -18.0% |
| 2004 | 0.2295 one-year-olds per square kilometre | -32.2% |
| 2005 | 0.1745 one-year-olds per square kilometre | -24.0% |
| 2006 | 0.1777 one-year-olds per square kilometre | +1.8% |
| 2007 | 0.1815 one-year-olds per square kilometre | +2.1% |
| 2008 | 0.0616 one-year-olds per square kilometre | -66.0% |
| 2009 | 0.1245 one-year-olds per square kilometre | +102.0% |
| 2010 | 0.1243 one-year-olds per square kilometre | -0.1% |
| 2011 | 0.2455 one-year-olds per square kilometre | +97.4% |
| 2012 | 0.2419 one-year-olds per square kilometre | -1.4% |
| 2013 | 0.1903 one-year-olds per square kilometre | -21.4% |
| 2014 | 0.332 one-year-olds per square kilometre | +74.5% |
| 2015 | 0.263 one-year-olds per square kilometre | -20.8% |
| 2016 | 0.2591 one-year-olds per square kilometre | -1.5% |
| 2017 | 0.3172 one-year-olds per square kilometre | +22.4% |
| 2018 | 0.3104 one-year-olds per square kilometre | -2.2% |
| 2019 | 0.3061 one-year-olds per square kilometre | -1.4% |
| 2020 | 0.2483 one-year-olds per square kilometre | -18.9% |
| 2021 | 0.1891 one-year-olds per square kilometre | -23.9% |
| 2022 | 0.5098 one-year-olds per square kilometre | +169.6% |
| 2023 | 0.8465 one-year-olds per square kilometre | +66.1% |
Sao Tome and Principe compared with similar countries
- Sao Tome and Principe's 0.8465 one-year-olds per square kilometre is above the median for lower middle income countries, which is 0.2635 one-year-olds per square kilometre, 3.2× the median. (46 countries reporting)
- Sao Tome and Principe's 0.8465 one-year-olds per square kilometre is above the median for Sub-Saharan Africa, which is 0.2848 one-year-olds per square kilometre, 3.0× the median. (48 countries reporting)
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | 1.88 one-year-olds per square kilometre | 0.9933 one-year-olds per square kilometre | 2.86 one-year-olds per square kilometre | 9 |
| 1990s | 1.13 one-year-olds per square kilometre | 0.3642 one-year-olds per square kilometre | 1.91 one-year-olds per square kilometre | 10 |
| 2000s | 0.2915 one-year-olds per square kilometre | 0.0616 one-year-olds per square kilometre | 0.8393 one-year-olds per square kilometre | 10 |
| 2010s | 0.259 one-year-olds per square kilometre | 0.1243 one-year-olds per square kilometre | 0.332 one-year-olds per square kilometre | 10 |
| 2020s | 0.4484 one-year-olds per square kilometre | 0.1891 one-year-olds per square kilometre | 0.8465 one-year-olds per square kilometre | 4 |
Countries ranked near Sao Tome and Principe
- 16 Rwanda 0.9254 one-year-olds per square kilometre compare
- 17 Syria 0.8835 one-year-olds per square kilometre compare
- 18 Saint Lucia 0.8614 one-year-olds per square kilometre compare
- 20 Afghanistan 0.8318 one-year-olds per square kilometre compare
- 21 Bangladesh 0.7772 one-year-olds per square kilometre compare
- 22 Azerbaijan 0.77 one-year-olds per square kilometre compare
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)
- Neonatal tetanus - number of reported cases, gaps filled 0 (2021)
- Population ages 00-04, female, annual growth rate 1.58 % 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 0.0651 units per person (2025)
- Population ages 00-04, male, annual growth rate 1.65 % 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 diphtheria in Sao Tome and Principe?
- Number of one-year-olds who are not vaccinated against diphtheria in Sao Tome and Principe was 0.8465 one-year-olds per square kilometre in 2023, according to Statizoid (derived).
- What is the highest number of one-year-olds who are not vaccinated against diphtheria recorded in Sao Tome and Principe?
- The highest recorded value was 2.86 one-year-olds per square kilometre in 1983.
- What is the lowest number of one-year-olds who are not vaccinated against diphtheria recorded in Sao Tome and Principe?
- The lowest recorded value was 0.0616 one-year-olds per square kilometre in 2008.
- How does Sao Tome and Principe rank for number of one-year-olds who are not vaccinated against diphtheria?
- Sao Tome and Principe ranks 19th out of 192 countries with data for 2023.
- Is number of one-year-olds who are not vaccinated against diphtheria 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 Statizoid (derived), published as part of Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus, per square kilometre. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 43 observations, free to reuse under Derived by Statizoid from the sources named on the page.
How this figure is calculated
Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus divided by Land area (sq. km), matched on country and year. Neither publisher issues this ratio as a series; it is computed here from both.
Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus ÷ Land area (sq. km)
Computed from
- Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus WHO & UNICEF (2025); UN, World Population Prospects (2024) – processed by Our World in Data
- Land area FAOSTAT, Food and Agriculture Organization of the United Nations (FAO)
Statizoid computes this series; the underlying measurements belong to the publishers named above. The arithmetic is applied to every country and year where both inputs report, and nothing is estimated unless the page says so.
About this data
Number of one-year-olds who are not vaccinated against diphtheria, pertussis and tetanus divided by Land area (sq. km), matched on country and year. Neither publisher issues this ratio as a series; it is computed here from both.