Sierra Leone's adults (ages 15-49) newly infected with HIV was 1,700 in 2024, the latest year in the World Bank's World Development Indicators. That is down 57.5% from 4,000 in 2014 (8.2% a year on average, compounded).
Key figures
| Value | Year | |
|---|---|---|
| Latest | 1,700 | 2024 |
| Five years earlier | 3,300 | 2019 |
| Ten years earlier | 4,000 | 2014 |
| Highest | 4,200 | 1997 |
| Lowest | 1,700 | 2024 |
| Average since 2015 | 3,100 | 2015–2024 |
| First recorded | 2,900 | 1990 |
What the numbers say
In 2024, Sierra Leone's adults (ages 15-49) newly infected with HIV fell 10.5% on 2023 (from 1,900 to 1,700).
Across the 30 yearly changes before that (1994 to 2023), the average change was −2.2% and a typical year strayed about 5.9% from that (the standard deviation). This year's change was 1.4 standard deviations below that average, so it was larger than a typical year, though not out of the range seen before.
On record, the biggest yearly rise was 17.2% in 1991 and the biggest yearly fall was 20.7% in 2022. The numbers show how large and when, not why; for the cause, look at what happened in that country in those years.
From 2015 to 2024 the straight-line trend is downward, about 281.21 a year. A straight line explains 95% of the movement over 10 observed years.
Worked out from the yearly values above. How the checks work: standard deviation, z-scores and straight-line trends.
How it compares
In 2024, Sierra Leone had the 52nd highest value of the 132 economies reporting that year. Higher is not always better: for some indicators the lowest value is the one to aim for. See the full ranking.
| Value | Year | |
|---|---|---|
| Sierra Leone | 1,700 | 2024 |
| World | 1.1 million | 2024 |
Closest to Sierra Leone in the 2024 ranking
- Bolivia — 51st of 132: 1,800
- Cuba — 52nd of 132: 1,700
- Ecuador — 53rd of 132: 1,700
- Afghanistan — 55th of 132: 1,600
- Panama — 56th of 132: 1,400
- Saudi Arabia — 57th of 132: 1,400
What this measures
Number of adults (ages 15-49) newly infected with HIV.
All 35 values
| Year | Adults (ages 15-49) newly infected with HIV |
|---|---|
| 2024 | 1,700 |
| 2023 | 1,900 |
| 2022 | 2,300 |
| 2021 | 2,900 |
| 2020 | 3,300 |
| 2019 | 3,300 |
| 2018 | 3,600 |
| 2017 | 3,900 |
| 2016 | 4,000 |
| 2015 | 4,100 |
| 2014 |
Adults (ages 15-49) newly infected with HIV in nearby economies
- Angola — 15,000 (2024)
- Benin — 860 (2024)
- Botswana — 3,800 (2024)
- Burkina Faso — 2,000 (2024)
- Burundi — 930 (2024)
- Cabo Verde — 200 (2024)
- Cameroon — 9,700 (2024)
- Central African Republic — 2,800 (2024)
- Chad — 2,800 (2024)
- Comoros — 100 (2024)
More health data for Sierra Leone
- Population ages 00-04, female (% of female population) — 13.22% (2025)
- Population ages 00-04, male (% of male population) — 13.55% (2025)
- Population ages 0-14, female — 1.65 million (2025)
- Population ages 0-14, female (% of female population) — 37.28% (2025)
- Population ages 0-14, male — 1.67 million (2025)
- Population ages 0-14, male (% of male population) — 38.03% (2025)
- Population ages 0-14, total — 3.32 million (2025)
- Population ages 0-14 (% of total population) — 37.65% (2025)
- Population ages 05-09, female (% of female population) — 12.34% (2025)
Reading data like this
Questions people ask
- What is Sierra Leone's adults (ages 15-49) newly infected with HIV?
- 1,700 in 2024, according to the World Bank (World Development Indicators).
- How has it changed since 1990?
- It is down 41.38% from 2,900 in 1990 (1.56% a year on average, compounded). The highest value was 4,200 in 1997 and the lowest 1,700 in 2024.
- How does Sierra Leone rank?
- 52nd highest of 132 economies with data for 2024.
- Is the latest change in adults (ages 15-49) newly infected with HIV unusual for Sierra Leone?
- In 2024, Sierra Leone's adults (ages 15-49) newly infected with HIV fell 10.5% on 2023 (from 1,900 to 1,700). Across the 30 yearly changes before that (1994 to 2023), the average change was −2.2% and a typical year strayed about 5.9% from that (the standard deviation). This year's change was 1.4 standard deviations below that average, so it was larger than a typical year, though not out of the range seen before.
Source
World Bank, World Development Indicators, indicator SH.HIV.INCD, licensed CC BY 4.0. Original source: UNAIDS estimates, Joint United Nations Programme on HIV/AIDS (UNAIDS), uri: https://aidsinfo.unaids.org/, publisher: UNAIDS, date accessed: 2025-08-27, date published: 2025-07 Figures are fetched from the World Bank API and refreshed monthly; see the series on data.worldbank.org. The full definition and method are in the World Bank's metadata glossary. Comparisons use the same World Bank release.
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