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Science Advances|October 4, 2023
History of primary-series and booster vaccination and protection against Omicron reinfectionHiam Chemaitelly, Houssein H Ayoub, Patrick Tang, et al.
Ebiomedicine|July 29, 2023
Effects of previous infection, vaccination, and hybrid immunity against symptomatic Alpha, Beta, and Delta SARS-CoV-2 infections: an observational studyHeba N Altarawneh, Hiam Chemaitelly, Houssein H Ayoub, et al.
Nature Medicine|July 10, 2021
mRNA-1273 COVID-19 vaccine effectiveness against the B.1.1.7 and B.1.351 variants and severe COVID-19 disease in QatarHiam Chemaitelly, Hadi M Yassine, Fatiha M Benslimane, et al.
Frontiers in Immunology|September 30, 2022
Effects of SARS-CoV-2 Alpha, Beta, and Delta variants, age, vaccination, and prior infection on infectiousness of SARS-CoV-2 infectionsSuelen H Qassim, Mohammad R Hasan, Patrick Tang, et al.
Journal of Travel Medicine|September 30, 2022
Duration of immune protection of SARS-CoV-2 natural infection against reinfectionHiam Chemaitelly, Nico Nagelkerke, Houssein H Ayoub, et al.
The New England Journal of Medicine|November 2, 2022
Covid-19 Vaccine Protection among Children and Adolescents in QatarHiam Chemaitelly, Sawsan AlMukdad, Houssein H Ayoub, et al.
American Journal of Epidemiology|December 7, 2023
Estimating protection afforded by prior infection in preventing reinfection: applying the test-negative study designHoussein H Ayoub, Milan Tomy, Hiam Chemaitelly, et al.
Nature Medicine|November 3, 2021
BNT162b2 and mRNA-1273 COVID-19 vaccine effectiveness against the SARS-CoV-2 Delta variant in QatarPatrick Tang, Mohammad R Hasan, Hiam Chemaitelly, et al.
The Lancet. Infectious Diseases|March 13, 2023
Long-term COVID-19 booster effectiveness by infection history and clinical vulnerability and immune imprinting: a retrospective population-based cohort studyHiam Chemaitelly, Houssein H Ayoub, Patrick Tang, et al.
The Lancet. Microbe|November 14, 2022
Protection from previous natural infection compared with mRNA vaccination against SARS-CoV-2 infection and severe COVID-19 in Qatar: a retrospective cohort studyHiam Chemaitelly, Houssein H Ayoub, Sawsan AlMukdad, et al.
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