Related Experiment Video
Updated: Oct 17, 2025

Quantification and Whole Genome Characterization of SARS-CoV-2 RNA in Wastewater and Air Samples
Published on: June 30, 2023
Demographics and outcomes of laboratory-confirmed COVID-19 cases during the first epidemic wave in Senegal
A T D-D Lawson1, M Dieng1, F A Faye2
1UFR of Health Sciences, University of Thiès, Thiès, Senegal.
Background:
Few studies have focused on the effects of COVID-19 on African populations. During the first epidemic wave in Senegal (May 1 to July 31, 2020), COVID-19 cases were isolated in treatment centers of epidemics (TCEs). We described the demographics and outcomes of COVID-19 cases in TCEs.
Patients And Methods:
All cases with laboratory-confirmed COVID-19 in Thiès medical region of Senegal were included.
Results:
COVID-19 was confirmed in 600 cases. Median age of cases (men: 357, 59.5%; women: 243, 40.5%) was 34.0years. The incidence was 12 per 100,000 inhabitants per month. Overall, 46 (7.7%) cases had a severe or critical form of the disease, and nine of them died. Of 455 cases quarantined in non-hospital TCEs, 340 (74.7%) had no symptom and 115 (25.3%) had mild or moderate symptoms.
Conclusion:
In this African retrospective cohort, COVID-19 cases were young and mostly asymptomatic with a low case fatality rate.
Related Concept Videos
Principles of Disease Surveillance
Steps in Outbreak Investigation
Statistical Methods for Analyzing Epidemiological Data
Bias in Epidemiological Studies
Prevalence and Incidence
Prevalence indicates the proportion of individuals in a population who have a specific disease or health...

