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29 yearsDeaths in Lassa fever patients presenting with Lassa virus antigenemia were skewed towards individuals less than 29 years of age.

Sierra Leonefièvre de Lassapublished 2014PLoS neglected tropical diseaseseurope_pmcdocument of 6 observations

40 %Of the gram-negative bacteria, 40% were Extended-spectrum beta-lactamase-producing Enterobacteriaceae.

Sierra LeoneExtended-spectrum beta-lactamase-producing Enterobacteriaceaepublished 2022Therapeutic advances in infectious diseaseeurope_pmcdocument of 6 observations

24.3 %Of the 3808 clients tested for HIV at Connaught Hospital from January to December 2017, 925 (24.3%) had a positive HIV test result.

Sierra LeoneVIH/sidaobserved 2017published 2019BMC research noteseurope_pmcdocument of 10 observations

62.5 %Among eight participants with positive blood CrAg, five (62.5%) died within the first month.

Sierra Leoneméningite cryptococciquepublished 2020BMC infectious diseaseseurope_pmcdocument of 7 observationsDOI 10.1186/s12879-020-4862-x

36,923 women_testedIn the during-COVID-19 phase, 36,923 women and 17,755 men were tested for HIV in Sierra Leone.

Sierra LeoneVIH/sidaobserved during COVID-19published 2025Impact of the COVID-19 pandemic on regional and national uptake of HIV testing services ineurope_pmcdocument of 11 observations

71.4 %Among the enrolled people with HIV in Freetown, Sierra Leone, 71.4% were female.

Sierra LeoneVIH/sidaobserved April to June 2022published 2023Vaccineseurope_pmcdocument of 5 observationsDOI 10.3390/vaccines11111685

The incubation period of Ebola virus disease was estimated to be 6 to 12 days.

Sierra Leonemaladie à virus Ebolaobserved 2014published 2014The New England journal of medicineeurope_pmcdocument of 14 observations

8,958 patientsNew ART initiations in Sierra Leone were 8,958 before the COVID-19 pandemic (March 2019–February 2020), 8,777 during the pandemic (March 2020–February 2021), and 13,996 after the pandemic (March 2021–February 2022).

Sierra LeoneVIH/sidaobserved March 2019-February 2020published 2025Evidence of health-system resilience in the uptake of antiretroviral therapy in Sierra Leoeurope_pmcdocument of 2 observations

11.4 %The prevalence of chronic kidney disease among adults in Freetown, Sierra Leone was 11.4%.

Sierra Leonemaladie rénale chroniqueobserved 2019–2021published 2023Burden of cardiometabolic risk factors and preclinical target organ damage among adults ineurope_pmcdocument of 8 observationsDOI 10.1101/2023.02.20.23286145

286 per_100000Sierra Leone had a tuberculosis incidence rate of 286 per 100,000 population in 2023.

Sierra Leonetuberculoseobserved 2023published 2025Effect of the COVID-19 pandemic on drug-resistant tuberculosis treatment outcomes at a nateurope_pmcdocument of 9 observations

0.75 fractionThree fourths of global cryptococcal disease related deaths occur in sub-Saharan Africa.

Sierra Leoneméningite cryptococciquepublished 2019Prevalence and Mortality of Cryptococcal Disease in Adults with Advanced HIV in an Urban Teurope_pmcdocument of 2 observations

38,825 women_testedIn the pre-COVID-19 phase, 38,825 women and 19,789 men were tested for HIV in Sierra Leone.

Sierra LeoneVIH/sidaobserved pre-COVID-19published 2025Impact of the COVID-19 pandemic on regional and national uptake of HIV testing services ineurope_pmcdocument of 11 observations

700,000 deaths_per_yearSepsis is a major contributor to global mortality with an estimated 700,000 sepsis-related deaths annually.

Sierra Leonesepsispublished 2020Sepsis and septic shock in COVID-19: a scoping review of the research dataeurope_pmcdocument of 17 observationsDOI 10.21203/rs.3.rs-30474/v1

383 patientsOf 701 drug-resistant TB patients, 383 (54.6%) were registered in the pre-COVID-19 period.

Sierra Leonedrug-resistant TBobserved pre-COVID-19published 2025Effect of the COVID-19 pandemic on drug-resistant tuberculosis treatment outcomes at a nateurope_pmcdocument of 9 observations

6,000 casesIn Sierra Leone, there are an estimated 6000 annual cases of chronic pulmonary aspergillosis.

Sierra Leonepulmonary aspergillosispublished 2021Therapeutic advances in infectious diseaseeurope_pmcdocument of 9 observations

88.2 %Among 761 HIV-exposed infants (HEIs), 671 (88.2%) received ART for prophylaxis within 72 hours of birth.

Sierra LeoneVIH/sidapublished 2026PLOS global public healtheurope_pmcdocument of 6 observations

36 %HIV testing rate increased by 36.0% in the post-COVID-19 period in Sierra Leone.

Sierra LeoneVIH/sidapublished 2025Impact of the COVID-19 pandemic on regional and national uptake of HIV testing services ineurope_pmcdocument of 11 observations

83.7 %Among 49 bacterial isolates from surgical site infections, 83.7% were gram-negative and 16.3% were gram-positive.

Sierra Leonesurgical site infectionobserved February and July 2021published 2022Antimicrobial resistance and infection controleurope_pmcdocument of 15 observationsDOI 10.1186/s13756-022-01078-y

80.4 %Among 306 adult participants in Freetown, Sierra Leone, 80.4% stated they would take anti-HBV medication.

Sierra Leonehépatite Bpublished 2023Healthcare (Basel, Switzerland)europe_pmcdocument of 5 observationsDOI 10.3390/healthcare11020177

11.6 %Among 197 patients with chronic respiratory symptoms in an urban tertiary hospital in Sierra Leone, 23 (11.6%) had chronic pulmonary aspergillosis (CPA).

Sierra Leonepulmonary aspergillosisobserved November 2021 to July 2022published 2023PLoS neglected tropical diseaseseurope_pmcdocument of 9 observations

Hand hygiene is the most important intervention for preventing healthcare-associated infections and can reduce preventable morbidity and mortality.

Sierra Leonehealthcare-associated infectionspublished 2023Tropical medicine and infectious diseaseeurope_pmcdocument of 4 observationsDOI 10.3390/tropicalmed8110486

89 %Fever was present in 89% of patients with Ebola virus disease at presentation.

Sierra Leonemaladie à virus Ebolapublished 2014The New England journal of medicineeurope_pmcdocument of 14 observations

8 %HIV-attributed mortality among infants and children was 8% in Sierra Leone (39 [8%] of 500).

Sierra LeoneVIH/sidaobserved Dec 3, 2016 to Dec 31, 2024published 2026The lancet. HIVPubMeddocument of 23 observations

55,141 testsThe median number of HIV tests in Sierra Leone was 55,141 in the during-COVID-19 phase (March 2020 to February 2021).

Sierra LeoneVIH/sidaobserved March 2020 to February 2021published 2025Impact of the COVID-19 pandemic on regional and national uptake of HIV testing services ineurope_pmcdocument of 11 observations

43.6 %Among 39 patients who acquired a surgical site infection (SSI), 43.6% occurred in contaminated wounds, 30.8% in clean-contaminated wounds, and 25.6% in clean wounds.

Sierra Leonesurgical site infectionobserved February and July 2021published 2022Antimicrobial resistance and infection controleurope_pmcdocument of 15 observationsDOI 10.1186/s13756-022-01078-y