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Open Forum Infectious Diseases|March 17, 2025
Evaluating Hospital Admission Data as Indicators of COVID-19 Severity: A National Assessment in QatarLayan Sukik, Hiam Chemaitelly, Houssein H Ayoub, et al.BMJ Open Respiratory Research|March 26, 2025
Protection conferred by SARS-CoV-2 infection across a spectrum of reinfection symptoms and severitiesLayan Sukik, Hiam Chemaitelly, Houssein H Ayoub, et al.JAMA|November 1, 2021
Association of Prior SARS-CoV-2 Infection With Risk of Breakthrough Infection Following mRNA Vaccination in QatarLaith J Abu-Raddad, Hiam Chemaitelly, Houssein H Ayoub, et al.Communications Medicine|July 2, 2025
Immune histories and natural infection protection during the omicron eraHiam Chemaitelly, Houssein H Ayoub, Niklas Bobrovitz, et al.Nature Communications|January 28, 2022
Relative infectiousness of SARS-CoV-2 vaccine breakthrough infections, reinfections, and primary infectionsLaith J Abu-Raddad, Hiam Chemaitelly, Houssein H Ayoub, et al.Nature Communications|August 9, 2022
Protection of Omicron sub-lineage infection against reinfection with another Omicron sub-lineageHiam Chemaitelly, Houssein H Ayoub, Peter Coyle, et al.Journal of Global Health|February 9, 2022
Characterizing the effective reproduction number during the COVID-19 pandemic: Insights from Qatar's experienceRaghid Bsat, Hiam Chemaitelly, Peter Coyle, et al.Influenza and Other Respiratory Viruses|November 29, 2023
SARS-CoV-2 infection and effects of age, sex, comorbidity, and vaccination among older individuals: A national cohort studyMai A Mahmoud, Houssein H Ayoub, Peter Coyle, et al.Nature Communications|June 2, 2022
Duration of mRNA vaccine protection against SARS-CoV-2 Omicron BA.1 and BA.2 subvariants in QatarHiam Chemaitelly, Houssein H Ayoub, Sawsan AlMukdad, et al.The New England Journal of Medicine|October 6, 2021
Waning of BNT162b2 Vaccine Protection against SARS-CoV-2 Infection in QatarHiam Chemaitelly, Patrick Tang, Mohammad R Hasan, et al.Pageof 7