Reported cases of measles, gaps filled in Sierra Leone
Sierra Leone: Reported cases of measles, gaps filled was 129 Cases in 2024. ◆ Volatile
Reported cases of measles, gaps filled in Sierra Leone, 1974–2024
Source: Statizoid (derived). Measured in Cases.
Analysis
Sierra Leone recorded 129 Cases for reported cases of measles, gaps filled in 2024.
The figure is down 80.0% on the previous year and down 87.2% over ten years.
Over the whole period, reported cases of measles, gaps filled in Sierra Leone peaked at 4,327 Cases in 1983 and was at its lowest, 0 Cases, in 2007.
That places Sierra Leone 77th out of 210 countries with data for 2024, putting it in the middle of the range.
The series is highly variable year to year, so single readings are best treated with caution.
Reported cases of measles, gaps filled in Sierra Leone, year by year
| Year | Cases | Change |
|---|---|---|
| 1974 | 1,328 Cases | — |
| 1975 | 901 Cases | -32.2% |
| 1976 | 474 Cases | -47.4% |
| 1977 | 534 Cases | +12.7% |
| 1978 | 151 Cases | -71.7% |
| 1979 | 4,102 Cases | +2616.6% |
| 1980 | 3,625 Cases | -11.6% |
| 1981 | 3,408 Cases | -6.0% |
| 1982 | 4,102 Cases | +20.4% |
| 1983 | 4,327 Cases | +5.5% |
| 1984 | 4,016 Cases | -7.2% |
| 1985 | 3,351 Cases | -16.6% |
| 1986 | 164 Cases | -95.1% |
| 1987 | 1,000 Cases | +509.8% |
| 1988 | 207 Cases | -79.3% |
| 1989 | 625 Cases | +201.9% |
| 1990 | 830 Cases | +32.8% |
| 1991 | 284 Cases | -65.8% |
| 1992 | 914 Cases | +221.8% |
| 1993 | 2,288 Cases | +150.3% |
| 1994 | 114 Cases | -95.0% |
| 1995 | 344 Cases | +201.8% |
| 1996 | 352.5 Cases | +2.5% |
| 1997 | 361 Cases | +2.4% |
| 1998 | 1,432 Cases | +296.8% |
| 1999 | 2,504 Cases | +74.8% |
| 2000 | 3,575 Cases | +42.8% |
| 2001 | 649 Cases | -81.8% |
| 2002 | 568 Cases | -12.5% |
| 2003 | 586 Cases | +3.2% |
| 2004 | 7 Cases | -98.8% |
| 2005 | 29 Cases | +314.3% |
| 2006 | 33 Cases | +13.8% |
| 2007 | 0 Cases | -100.0% |
| 2008 | 44 Cases | — |
| 2009 | 31 Cases | -29.5% |
| 2010 | 1,089 Cases | +3412.9% |
| 2011 | 1,865 Cases | +71.3% |
| 2012 | 678 Cases | -63.6% |
| 2013 | 15 Cases | -97.8% |
| 2014 | 1,006 Cases | +6606.7% |
| 2015 | 607 Cases | -39.7% |
| 2016 | 920 Cases | +51.6% |
| 2017 | 1,873 Cases | +103.6% |
| 2018 | 344 Cases | -81.6% |
| 2019 | 40 Cases | -88.4% |
| 2020 | 17 Cases | -57.5% |
| 2021 | 170 Cases | +900.0% |
| 2022 | 731 Cases | +330.0% |
| 2023 | 645 Cases | -11.8% |
| 2024 | 129 Cases | -80.0% |
Sierra Leone compared with similar countries
- Sierra Leone's 129 Cases is below the median for low income countries, which is 1,237 Cases, 10% of the median. (25 countries reporting)
- Sierra Leone's 129 Cases is below the median for Sub-Saharan Africa, which is 551 Cases, 23% of the median. (48 countries reporting)
Biggest year-on-year movements
Years where Reported cases of measles, gaps filled in Sierra Leone changed far more than this series normally does. A large move can be a real event or a change in how the figure was measured — the source note below says who published it.
| Year | Change | From | To |
|---|---|---|---|
| 2014 | +6606.7% | 15 Cases | 1,006 Cases |
| 2010 | +3412.9% | 31 Cases | 1,089 Cases |
| 1979 | +2616.6% | 151 Cases | 4,102 Cases |
| 2021 | +900.0% | 17 Cases | 170 Cases |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1970s | 1,248 Cases | 151 Cases | 4,102 Cases | 6 |
| 1980s | 2,482 Cases | 164 Cases | 4,327 Cases | 10 |
| 1990s | 942.35 Cases | 114 Cases | 2,504 Cases | 10 |
| 2000s | 552.2 Cases | 0 Cases | 3,575 Cases | 10 |
| 2010s | 843.7 Cases | 15 Cases | 1,873 Cases | 10 |
| 2020s | 338.4 Cases | 17 Cases | 731 Cases | 5 |
Countries ranked near Sierra Leone
- 75 Netherlands 202 Cases compare
- 76 Canada 147 Cases compare
- 78 Syrian Arab Republic 128 Cases compare
- 79 Central African Republic 125 Cases compare
- 80 United States of America 121 Cases 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 reported cases of measles, gaps filled in Sierra Leone?
- Reported cases of measles, gaps filled in Sierra Leone was 129 Cases in 2024, according to Statizoid (derived).
- What is the highest reported cases of measles, gaps filled recorded in Sierra Leone?
- The highest recorded value was 4,327 Cases in 1983.
- What is the lowest reported cases of measles, gaps filled recorded in Sierra Leone?
- The lowest recorded value was 0 Cases in 2007.
- How does Sierra Leone rank for reported cases of measles, gaps filled?
- Sierra Leone ranks 77th out of 210 countries with data for 2024.
- Is reported cases of measles, gaps filled rising or falling in Sierra Leone?
- Over the last ten years it is down 87.2%. 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 Reported cases of measles, gaps filled. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 51 observations, free to reuse under Derived by Statizoid from the sources named on the page.
How this figure is calculated
Reported cases of measles with 433 missing years estimated by linear interpolation between the nearest real observations. Only gaps of 4 years or fewer are filled, and never beyond the first or last actual measurement — these are filled holes, not forecasts.
Computed from
- Reported cases of measles World Health Organization - Global Health Observatory (2026) – with minor processing by Our World in Data
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
Reported cases of measles with 433 missing years estimated by linear interpolation between the nearest real observations. Only gaps of 4 years or fewer are filled, and never beyond the first or last actual measurement — these are filled holes, not forecasts.