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 0.0035 one-year-olds per person 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 person.
Analysis
The most recent figure for number of one-year-olds who are not vaccinated against diphtheria in Sao Tome and Principe is 0.0035 one-year-olds per person, measured in 2023.
The figure is up 62.8% on the previous year and up 272.2% 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 0.0263 one-year-olds per person in 1983 and was at its lowest, 0.0003 one-year-olds per person, in 2008.
That places Sao Tome and Principe 56th out of 192 countries with data for 2023, putting it in the middle of the range.
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 person | Change |
|---|---|---|
| 1981 | 0.0208 one-year-olds per person | — |
| 1982 | 0.0236 one-year-olds per person | +13.3% |
| 1983 | 0.0263 one-year-olds per person | +11.5% |
| 1984 | 0.0181 one-year-olds per person | -31.3% |
| 1985 | 0.0184 one-year-olds per person | +1.7% |
| 1986 | 0.0124 one-year-olds per person | -32.7% |
| 1987 | 0.0099 one-year-olds per person | -19.9% |
| 1988 | 0.0082 one-year-olds per person | -17.6% |
| 1989 | 0.0131 one-year-olds per person | +61.2% |
| 1990 | 0.0028 one-year-olds per person | -78.4% |
| 1991 | 0.0046 one-year-olds per person | +61.6% |
| 1992 | 0.0113 one-year-olds per person | +145.6% |
| 1993 | 0.014 one-year-olds per person | +24.4% |
| 1994 | 0.0059 one-year-olds per person | -58.2% |
| 1995 | 0.0071 one-year-olds per person | +21.2% |
| 1996 | 0.0106 one-year-olds per person | +49.8% |
| 1997 | 0.0089 one-year-olds per person | -16.8% |
| 1998 | 0.0087 one-year-olds per person | -1.7% |
| 1999 | 0.007 one-year-olds per person | -20.1% |
| 2000 | 0.0056 one-year-olds per person | -19.6% |
| 2001 | 0.0025 one-year-olds per person | -56.0% |
| 2002 | 0.0026 one-year-olds per person | +7.3% |
| 2003 | 0.0021 one-year-olds per person | -20.0% |
| 2004 | 0.0014 one-year-olds per person | -33.8% |
| 2005 | 0.001 one-year-olds per person | -25.8% |
| 2006 | 0.001 one-year-olds per person | -0.6% |
| 2007 | 0.001 one-year-olds per person | -0.4% |
| 2008 | 0.0003 one-year-olds per person | -66.8% |
| 2009 | 0.0007 one-year-olds per person | +97.4% |
| 2010 | 0.0007 one-year-olds per person | -2.3% |
| 2011 | 0.0013 one-year-olds per person | +93.3% |
| 2012 | 0.0012 one-year-olds per person | -3.4% |
| 2013 | 0.0009 one-year-olds per person | -22.9% |
| 2014 | 0.0016 one-year-olds per person | +71.3% |
| 2015 | 0.0013 one-year-olds per person | -22.2% |
| 2016 | 0.0012 one-year-olds per person | -3.1% |
| 2017 | 0.0015 one-year-olds per person | +20.5% |
| 2018 | 0.0014 one-year-olds per person | -3.6% |
| 2019 | 0.0014 one-year-olds per person | -2.8% |
| 2020 | 0.0011 one-year-olds per person | -20.4% |
| 2021 | 0.0008 one-year-olds per person | -25.4% |
| 2022 | 0.0022 one-year-olds per person | +164.4% |
| 2023 | 0.0035 one-year-olds per person | +62.8% |
Sao Tome and Principe compared with similar countries
- Sao Tome and Principe's 0.0035 one-year-olds per person is below the median for lower middle income countries, which is 0.0036 one-year-olds per person, 98% of the median. (46 countries reporting)
- Sao Tome and Principe's 0.0035 one-year-olds per person is below the median for Sub-Saharan Africa, which is 0.0048 one-year-olds per person, 73% of the median. (48 countries reporting)
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1980s | 0.0167 one-year-olds per person | 0.0082 one-year-olds per person | 0.0263 one-year-olds per person | 9 |
| 1990s | 0.0081 one-year-olds per person | 0.0028 one-year-olds per person | 0.014 one-year-olds per person | 10 |
| 2000s | 0.0018 one-year-olds per person | 0.0003 one-year-olds per person | 0.0056 one-year-olds per person | 10 |
| 2010s | 0.0012 one-year-olds per person | 0.0007 one-year-olds per person | 0.0016 one-year-olds per person | 10 |
| 2020s | 0.0019 one-year-olds per person | 0.0008 one-year-olds per person | 0.0035 one-year-olds per person | 4 |
Countries ranked near Sao Tome and Principe
- 53 Timor-Leste 0.0037 one-year-olds per person compare
- 54 Pakistan 0.0036 one-year-olds per person compare
- 55 Burundi 0.0035 one-year-olds per person compare
- 57 Eswatini 0.0035 one-year-olds per person compare
- 58 Palestine, State of 0.0033 one-year-olds per person compare
- 59 Cambodia 0.0033 one-year-olds per person 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 0.0035 one-year-olds per person 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 0.0263 one-year-olds per person 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 0.0003 one-year-olds per person 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 56th 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 272.2%. 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 capita. Statizoid updates them automatically from the source API.
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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 Population, total, 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 ÷ Population, total
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
- Population, total World Population Prospects, United Nations (UN)
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 Population, total, matched on country and year. Neither publisher issues this ratio as a series; it is computed here from both.