Measles - number of reported cases, gaps filled in Sierra Leone
Sierra Leone: Measles - number of reported cases, gaps filled was 207 in 2025. ◆ Volatile
Measles - number of reported cases, gaps filled in Sierra Leone, 1974–2025
Source: Statizoid (derived).
Analysis
In 2025, measles - number of reported cases, gaps filled in Sierra Leone stood at 207.
Compared with earlier readings it is up 60.5% on the previous year and down 65.9% over ten years.
Over the whole period, measles - number of reported cases, gaps filled in Sierra Leone peaked at 4,327 in 1983 and was at its lowest, 0, in 2007.
Sierra Leone ranks 69th of 210 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.
Measles - number of reported cases, gaps filled in Sierra Leone, year by year
| Year | Value | Change |
|---|---|---|
| 1974 | 1,328 | — |
| 1975 | 901 | -32.2% |
| 1976 | 474 | -47.4% |
| 1977 | 534 | +12.7% |
| 1978 | 151 | -71.7% |
| 1979 | 4,102 | +2616.6% |
| 1980 | 3,625 | -11.6% |
| 1981 | 3,408 | -6.0% |
| 1982 | 4,102 | +20.4% |
| 1983 | 4,327 | +5.5% |
| 1984 | 4,016 | -7.2% |
| 1985 | 3,351 | -16.6% |
| 1986 | 164 | -95.1% |
| 1987 | 1,000 | +509.8% |
| 1988 | 207 | -79.3% |
| 1989 | 625 | +201.9% |
| 1990 | 830 | +32.8% |
| 1991 | 284 | -65.8% |
| 1992 | 914 | +221.8% |
| 1993 | 2,288 | +150.3% |
| 1994 | 114 | -95.0% |
| 1995 | 344 | +201.8% |
| 1996 | 352.5 | +2.5% |
| 1997 | 361 | +2.4% |
| 1998 | 1,432 | +296.8% |
| 1999 | 2,504 | +74.8% |
| 2000 | 3,575 | +42.8% |
| 2001 | 649 | -81.8% |
| 2002 | 568 | -12.5% |
| 2003 | 586 | +3.2% |
| 2004 | 7 | -98.8% |
| 2005 | 29 | +314.3% |
| 2006 | 33 | +13.8% |
| 2007 | 0 | -100.0% |
| 2008 | 44 | — |
| 2009 | 31 | -29.5% |
| 2010 | 1,089 | +3412.9% |
| 2011 | 1,865 | +71.3% |
| 2012 | 678 | -63.6% |
| 2013 | 15 | -97.8% |
| 2014 | 1,006 | +6606.7% |
| 2015 | 607 | -39.7% |
| 2016 | 920 | +51.6% |
| 2017 | 1,873 | +103.6% |
| 2018 | 344 | -81.6% |
| 2019 | 40 | -88.4% |
| 2020 | 17 | -57.5% |
| 2021 | 170 | +900.0% |
| 2022 | 731 | +330.0% |
| 2023 | 645 | -11.8% |
| 2024 | 129 | -80.0% |
| 2025 | 207 | +60.5% |
Sierra Leone compared with similar countries
- Sierra Leone's 207 is below the median for low income countries, which is 795, 26% of the median. (25 countries reporting)
- Sierra Leone's 207 is below the median for Sub-Saharan Africa, which is 543, 38% of the median. (48 countries reporting)
Biggest year-on-year movements
Years where Measles - number of reported cases, 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 | 1,006 |
| 2010 | +3412.9% | 31 | 1,089 |
| 1979 | +2616.6% | 151 | 4,102 |
| 2021 | +900.0% | 17 | 170 |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1970s | 1,248 | 151 | 4,102 | 6 |
| 1980s | 2,482 | 164 | 4,327 | 10 |
| 1990s | 942.35 | 114 | 2,504 | 10 |
| 2000s | 552.2 | 0 | 3,575 | 10 |
| 2010s | 843.7 | 15 | 1,873 | 10 |
| 2020s | 316.5 | 17 | 731 | 6 |
Countries ranked near Sierra Leone
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 measles - number of reported cases, gaps filled in Sierra Leone?
- Measles - number of reported cases, gaps filled in Sierra Leone was 207 in 2025, according to Statizoid (derived).
- What is the highest measles - number of reported cases, gaps filled recorded in Sierra Leone?
- The highest recorded value was 4,327 in 1983.
- What is the lowest measles - number of reported cases, gaps filled recorded in Sierra Leone?
- The lowest recorded value was 0 in 2007.
- How does Sierra Leone rank for measles - number of reported cases, gaps filled?
- Sierra Leone ranks 69th out of 210 countries with data for 2025.
- Is measles - number of reported cases, gaps filled rising or falling in Sierra Leone?
- Over the last ten years it is down 65.9%. 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 Measles - number of reported cases, gaps filled. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 52 observations, free to reuse under Derived by Statizoid from the sources named on the page.
How this figure is calculated
Measles - number of reported cases with 449 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
- Measles - number of reported cases World Health Organization, Global Health Observatory
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
Measles - number of reported cases with 449 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.