Number of one-year-olds who are not vaccinated against diphtheria in Sierra Leone
Sierra Leone: Number of one-year-olds who are not vaccinated against diphtheria was 0.0025 one-year-olds per person in 2023. ◆ Volatile
Number of one-year-olds who are not vaccinated against diphtheria in Sierra Leone, 1999–2023
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 Sierra Leone is 0.0025 one-year-olds per person, measured in 2023.
Compared with earlier readings it is down 1.5% on the previous year and down 3.8% over ten years.
Over the whole period, number of one-year-olds who are not vaccinated against diphtheria in Sierra Leone peaked at 0.0227 one-year-olds per person in 2001 and was at its lowest, 0.0015 one-year-olds per person, in 2019.
Sierra Leone ranks 72nd of 192 countries on this measure, 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 Sierra Leone, year by year
| Year | one-year-olds per person | Change |
|---|---|---|
| 1999 | 0.0209 one-year-olds per person | — |
| 2000 | 0.0205 one-year-olds per person | -1.8% |
| 2001 | 0.0227 one-year-olds per person | +10.5% |
| 2002 | 0.0171 one-year-olds per person | -24.4% |
| 2003 | 0.0098 one-year-olds per person | -42.8% |
| 2004 | 0.0126 one-year-olds per person | +28.5% |
| 2005 | 0.0124 one-year-olds per person | -1.8% |
| 2006 | 0.0125 one-year-olds per person | +1.2% |
| 2007 | 0.0124 one-year-olds per person | -0.6% |
| 2008 | 0.0079 one-year-olds per person | -36.5% |
| 2009 | 0.0054 one-year-olds per person | -31.0% |
| 2010 | 0.0047 one-year-olds per person | -13.2% |
| 2011 | 0.0037 one-year-olds per person | -22.4% |
| 2012 | 0.003 one-year-olds per person | -19.2% |
| 2013 | 0.0026 one-year-olds per person | -12.2% |
| 2014 | 0.0054 one-year-olds per person | +108.2% |
| 2015 | 0.0044 one-year-olds per person | -19.7% |
| 2016 | 0.0049 one-year-olds per person | +11.7% |
| 2017 | 0.003 one-year-olds per person | -38.5% |
| 2018 | 0.0021 one-year-olds per person | -30.6% |
| 2019 | 0.0015 one-year-olds per person | -29.2% |
| 2020 | 0.0026 one-year-olds per person | +78.0% |
| 2021 | 0.0023 one-year-olds per person | -12.3% |
| 2022 | 0.0025 one-year-olds per person | +10.9% |
| 2023 | 0.0025 one-year-olds per person | -1.5% |
Sierra Leone compared with similar countries
- Sierra Leone's 0.0025 one-year-olds per person is below the median for low income countries, which is 0.0072 one-year-olds per person, 35% of the median. (25 countries reporting)
- Sierra Leone's 0.0025 one-year-olds per person is below the median for Sub-Saharan Africa, which is 0.0048 one-year-olds per person, 52% of the median. (48 countries reporting)
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1990s | 0.0209 one-year-olds per person | 0.0209 one-year-olds per person | 0.0209 one-year-olds per person | 1 |
| 2000s | 0.0133 one-year-olds per person | 0.0054 one-year-olds per person | 0.0227 one-year-olds per person | 10 |
| 2010s | 0.0035 one-year-olds per person | 0.0015 one-year-olds per person | 0.0054 one-year-olds per person | 10 |
| 2020s | 0.0025 one-year-olds per person | 0.0023 one-year-olds per person | 0.0026 one-year-olds per person | 4 |
Countries ranked near Sierra Leone
- 69 Togo 0.0026 one-year-olds per person compare
- 70 Burkina Faso 0.0026 one-year-olds per person compare
- 71 Peru 0.0025 one-year-olds per person compare
- 73 Kiribati 0.0025 one-year-olds per person compare
- 74 Belize 0.0025 one-year-olds per person compare
- 75 Guatemala 0.0024 one-year-olds per person compare
More health data for Sierra Leone
- Un projection of annual infant deaths, annual growth rate -2.34 % change on previous year (2100)
- Heat deaths vs projected death rates, annual growth rate 0.773 % change on previous year (2090)
- Estimated changes in temperature-related death rates compared to projected death rates 1,199 deaths per 1,000 people (2090)
- Number of infants who die before age 1 4,209 deaths (2100)
- Neonatal tetanus - number of reported cases, gaps filled 38 (2025)
- Population ages 00-04, female, annual growth rate 0.6447 % change on previous year (2025)
- Population ages 00-04, female, per unit of GDP 0.0001 units per US$ of GDP (2025)
- Population ages 00-04, female, per capita 0.0663 units per person (2025)
- Population ages 00-04, male, annual growth rate 0.6611 % change on previous year (2025)
- Population ages 00-04, male, per unit of GDP 0.0001 units per US$ of GDP (2025)
Frequently asked questions
- What is number of one-year-olds who are not vaccinated against diphtheria in Sierra Leone?
- Number of one-year-olds who are not vaccinated against diphtheria in Sierra Leone was 0.0025 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 Sierra Leone?
- The highest recorded value was 0.0227 one-year-olds per person in 2001.
- What is the lowest number of one-year-olds who are not vaccinated against diphtheria recorded in Sierra Leone?
- The lowest recorded value was 0.0015 one-year-olds per person in 2019.
- How does Sierra Leone rank for number of one-year-olds who are not vaccinated against diphtheria?
- Sierra Leone ranks 72nd out of 192 countries with data for 2023.
- Is number of one-year-olds who are not vaccinated against diphtheria rising or falling in Sierra Leone?
- Over the last ten years it is down 3.8%. The long-run trend across the full record is volatile.
- Where does this Sierra Leone 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.
Download this data
CSV · JSON — 25 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.