ArticleBMC infectious diseases2026
Asymptomatic COVID-19 among university students during the low-risk transmission period.
Article in BMC infectious diseases, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundBased on the transmission indicators in 2023 and level of herd immunity, it is expected that there are still asymptomatic cases of COVID-19 in the population. The purpose of this study is to evaluate the prevalence and factors associated with asymptomatic SARS-CoV-2 infection during the low-intensity transmission period.
methodsA cross-sectional study was conducted from February 20 to April 30, 2023 among students at the University of Belgrade. Data were collected through face-to-face interviews using a structured questionnaire. Students who visited the Student Health Center for health checks were invited to participate. Two nasopharyngeal swabs were collected, which were tested on-site using the SARS-CoV-2 rapid antigen test and RT-PCR in the laboratory.
resultsOut of 1,307 university students enrolled in the study, 28 tested positive for SARS-CoV-2 on RT-PCR, resulting in a prevalence of asymptomatic SARS-CoV-2 cases of 2.1%. Based on the adjusted Firth's logistic regression model, independent factors associated with developing asymptomatic SARS-CoV-2 infection were: being male (odds ratio [OR] = 0.26, 95% confidence interval [CI] 0.12-0.55), living with people older than 65 years (OR = 1.90, 95% CI 1.03-3.16), bedtime until 10 pm (OR = 0.36, 95% CI 0.15-0.96), attending celebrations/parties (OR = 2.32, 95% CI 1.06-5.40), and having contact with a person who had a respiratory infection in the last 14 days (OR = 8.09, 95% CI 1.96-26.02).
conclusionThe prevalence of asymptomatic infection in the university student population is around 2% during the low-risk transmission period. Despite the low prevalence of COVID-19, surveillance of COVID-19 should still continue in the future.
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