ArticleFrontiers in public health2022
Epidemiological Trends of Coronavirus Disease 2019 in Sierra Leone From March 2020 to October 2021.
Article in Frontiers in public health, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 1 of them a synthesis that pooled it.
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8 citing papers in PubMed, 1 synthesis or guideline pooled it.
- A Systematic Review of the Markers of Severity in Acute Respiratory Infections to Inform Primary Care Surveillance.Influenza and other respiratory viruses · 2025Pooled it
- Informing life-course immunization and pandemic preparedness: a COVID-19 vaccine evaluation and HPV introduction experience in Sierra Leone.BMC public health · 2026Article
- Widespread SARS-CoV-2 Transmission Despite Limited Reported Cases and Clinical Disease: Exploring the Role of Pre-Existing Humoral Immunity to SARS-CoV-2 in Eastern Sierra Leone.Immunity, inflammation and disease · 2026Article
- Evidence of resiliency in maternal health services and outcomes in Kono District, Sierra Leone during the COVID-19 pandemic: an observational study.BMC public health · 2025Observational
- COVID-19 prevention and preparedness among healthcare workers in Sierra Leone.Journal of public health in Africa · 2025Article
- SARS-CoV-2 seroprevalence and associated factors among people living with HIV in Sierra Leone.Immunity, inflammation and disease · 2024Article
- Improving the quality of COVID-19 care in Sierra Leone: A modified Delphi process and serial nationwide assessments of quality of COVID-19 care in Sierra Leone.PLOS global public health · 2023Article
- Multiple introduced lineages and the single native lineage co-driving the four waves of the COVID-19 pandemic in West Africa.Frontiers in public health · 2022Article
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10 authors.
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Abstract
Coronavirus disease 2019 (COVID-19), a serious public health challenge the world over, has led to significant health concerns in Sierra Leone. In the present study, epidemic indices, such as the number of cases, positivity rate, reproduction rate (R0), case fatality rate (CFR), age, and sex, were used to characterize the epidemiological trends of COVID-19. As of October 31, 2021, a total of 6,398 cases and 121 related deaths had been confirmed. The total number of COVID-19 reverse transcription polymerase chain reaction (RT-PCR) tests conducted to October 31, 2021, was 249,534, and the average positivity rate was 2.56%. Three waves of COVID-19 were recorded, occurring during weeks 15-46 in 2020 (2,369 cases), week 47 in 2020 to week 16 in 2021 (1,665 cases), and weeks 17-43 in 2021 (2,364 cases), respectively. Remarkably, there was no increase in the numbers of confirmed COVID-19 cases despite rising test numbers throughout the three waves. Moreover, three high R0 values were observed before each wave. The number of positive cases significantly correlated with positive numbers of international arrivals (
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