23 Apr 2026Open access
National Prevalence and Risk Factors of Hepatitis B Virus Infection in Tunisia Two Decades After Vaccine IntroductionPublisher siteVaccines, Hepatitis B Virus Studies
Active, last published 2026
In covid-19 epidemiological studies
Hejer
Letaief
Scholar“Research focused on COVID-19 epidemiological studies and adjacent fields.”
University of Tunis El Manar
Tunisia
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114
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01 · About the work
What I study
ejer Letaief is a researcher working on COVID-19 epidemiological studies. A fuller summary will appear once they update their profile.
02 · Reach
Publication output and reach
Hejer's work has been cited 114 times across 4 active years. Bars show publications per year; the line shows cumulative citation totals across publications first appearing in each year.
03 · Research focus
Topics
COVID-19 epidemiological studies×12COVID-19 Clinical Research Studies×8SARS-CoV-2 and COVID-19 Research×8Cervical Cancer and HPV Research×4COVID-19 diagnosis using AI×4
04 · Where I am
Affiliations
Affiliation on published researchTunis University, TunisiaDrawn from the institution listed on this researcher’s published work.
Research themes (UN SDGs)
05 · Selected work
Recent publications
4 works30 Dec 2025Open access
Long-Term Health Effects of COVID-19 in Tunisia, 2020–2021Publisher siteInternational Journal of Environmental Research and Public Health, Long-Term Effects of COVID-19
15 Feb 20242cites
Vaccine effectiveness against COVID-19: A test negative case-control study in Tunisia, August 2021Publisher siteVaccine, SARS-CoV-2 and COVID-19 Research
12 Jun 2023Open access1cites
Baseline Seroprevalence of SARS-CoV-2 Specific Antibodies in Hot Spot Areas of Great Tunis, up to 3 Months Post Disease Onset in TunisiaPublisher siteEpidemiologia, SARS-CoV-2 and COVID-19 Research
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