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Public Health|October 30, 2025
Estimating SARS-CoV-2 infection incidence and detection rates: Demonstrating a novel surveillance methodHoussein H Ayoub, Hiam Chemaitelly, Patrick Tang, et al.
International Journal of Infectious Diseases : IJID : Official Publication of the International Society for Infectious Diseases|June 3, 2026
Routine SARS-CoV-2 Testing Frequency and Risk of Severe COVID-19: A Nationwide Population-Based StudyLaith J Abu-Raddad, Houssein H Ayoub, Peter Coyle, et al.
Plos One|September 26, 2025
Evaluating the cost-effectiveness of COVID-19 mRNA primary-series vaccination in Qatar: An integrated epidemiological and economic analysisHiam Chemaitelly, Houssein H Ayoub, Peter Coyle, et al.
Nature|February 5, 2025
Differential protection against SARS-CoV-2 reinfection pre- and post-OmicronHiam Chemaitelly, Houssein H Ayoub, Peter Coyle, et al.
Vaccine|July 30, 2025
Comparative effectiveness of one versus two doses of COVID-19 vaccines in Qatar: Evidence of converging protection over timeHiam Chemaitelly, Houssein H Ayoub, Peter Coyle, et al.
Influenza and Other Respiratory Viruses|September 29, 2024
BNT162b2 Versus mRNA-1273 Vaccines: Comparative Analysis of Long-Term Protection Against SARS-CoV-2 Infection and Severe COVID-19 in QatarHiam Chemaitelly, Houssein H Ayoub, Peter Coyle, et al.
Frontiers in Medicine|March 26, 2024
Addressing bias in the definition of SARS-CoV-2 reinfection: implications for underestimationHiam Chemaitelly, Houssein H Ayoub, Patrick Tang, et al.
Elife|June 9, 2025
Assessing healthy vaccinee effect in COVID-19 vaccine effectiveness studies: a national cohort study in QatarHiam Chemaitelly, Houssein H Ayoub, Peter Coyle, et al.
Scientific Reports|October 8, 2025
Effectiveness and durability of a fourth dose of ancestral-strain mRNA vaccines against SARS-CoV-2 infection: a nationwide matched cohort study in QatarLayan Sukik, Hiam Chemaitelly, Houssein H Ayoub, et al.
BMC Infectious Diseases|August 17, 2025
Effectiveness of ChAdOx1 nCoV-19 (Vaxzevria) primary series vaccine against SARS-CoV-2 beta and delta variants: a nationwide studyHiam Chemaitelly, Houssein H Ayoub, Peter Coyle, et al.
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