Browsing Public Health by Author "n 89200647"
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Addressing bias in the definition of SARS-CoV-2 reinfection: implications for underestimation
Chemaitelly, Hiam; Ayoub, Houssein H.; Tang, Patrick; Yassine, Hadi M.; Al Thani, Asmaa A.; Hasan, Mohammad R.; Coyle, Peter; Al-Kanaani, Zaina; Al-Kuwari, Einas; Jeremijenko, Andrew; Kaleeckal, Anvar Hassan; Latif, Ali Nizar; Shaik, Riyazuddin Mohammad; Abdul-Rahim, Hanan F.; Nasrallah, Gheyath K.; Al-Kuwari, Mohamed Ghaith; Butt, Adeel A.; Al-Romaihi, Hamad Eid; Al-Thani, Mohamed H.; Al-Khal, Abdullatif; Bertollini, Roberto; Abu-Raddad, Laith J.... more authors ... less authors ( Frontiers Media , 2024 , Article)Introduction: Reinfections are increasingly becoming a feature in the epidemiology of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. However, accurately defining reinfection poses methodological ... -
All-cause and COVID-19 mortality in Qatar during the COVID-19 pandemic
Alnuaimi, Asma A.; Chemaitelly, Hiam; Semaan, Sandy; Almukdad, Sawsan; Al-Kanaani, Zaina; Kaleeckal, Anvar Hassan; Latif, Ali Nizar; Al-Romaihi, Hamad Eid; Butt, Adeel A.; Al-Thani, Mohamed H.; Bertollini, Roberto; Abdulmalik, Mariam; Al-Khal, Abdullatif; Abu-Raddad, Laith J.... more authors ... less authors ( BMJ Publishing Group , 2023 , Article)Objective To investigate all-cause mortality, COVID-19 mortality and all-cause non-COVID-19 mortality in Qatar during the COVID-19 pandemic. Methods A national, retrospective cohort analysis and national, matched, retrospective ... -
Association of Prior SARS-CoV-2 Infection With Risk of Breakthrough Infection Following mRNA Vaccination in Qatar.
Abu-Raddad, Laith J; Chemaitelly, Hiam; Ayoub, Houssein H; Yassine, Hadi M; Benslimane, Fatiha M; Al Khatib, Hebah A; Tang, Patrick; Hasan, Mohammad R; Coyle, Peter; Al Kanaani, Zaina; Al Kuwari, Einas; Jeremijenko, Andrew; Kaleeckal, Anvar Hassan; Latif, Ali Nizar; Shaik, Riyazuddin Mohammad; Abdul Rahim, Hanan F; Nasrallah, Gheyath K; Al Kuwari, Mohamed Ghaith; Butt, Adeel A; Al Romaihi, Hamad Eid; Al-Thani, Mohamed H; Al Khal, Abdullatif; Bertollini, Roberto... more authors ... less authors ( American Medical Association , 2021 , Article)The effect of prior SARS-CoV-2 infection on vaccine protection remains poorly understood. To assess protection from SARS-CoV-2 breakthrough infection after mRNA vaccination among persons with vs without prior SARS-CoV-2 ... -
BNT162b2 and mRNA-1273 COVID-19 vaccine effectiveness against the SARS-CoV-2 Delta variant in Qatar.
Tang, Patrick; Hasan, Mohammad R; Chemaitelly, Hiam; Yassine, Hadi M; Benslimane, Fatiha M; Al Khatib, Hebah A; AlMukdad, Sawsan; Coyle, Peter; Ayoub, Houssein H; Al Kanaani, Zaina; Al Kuwari, Einas; Jeremijenko, Andrew; Kaleeckal, Anvar Hassan; Latif, Ali Nizar; Shaik, Riyazuddin Mohammad; Abdul Rahim, Hanan F; Nasrallah, Gheyath K; Al Kuwari, Mohamed Ghaith; Al Romaihi, Hamad Eid; Butt, Adeel A; Al-Thani, Mohamed H; Al Khal, Abdullatif; Bertollini, Roberto; Abu-Raddad, Laith J... more authors ... less authors ( Nature Researc , 2021 , Article)With the global expansion of the highly transmissible SARS-CoV-2 Delta (B.1.617.2) variant, we conducted a matched test-negative case-control study to assess the real-world effectiveness of COVID-19 messenger RNA vaccines ... -
BNT162b2 antigen dose and SARS-CoV-2 omicron infection in adolescents
Chemaitelly, Hiam; Ayoub, Houssein H.; Coyle, Peter; Tang, Patrick; Yassine, Hadi M.; Al Thani, Asmaa A.; Al-Khatib, Hebah A.; Hasan, Mohammad R.; Al-Kanaani, Zaina; Al-Kuwari, Einas; Jeremijenko, Andrew; Kaleeckal, Anvar Hassan; Latif, Ali Nizar; Shaik, Riyazuddin Mohammad; Abdul-Rahim, Hanan F.; Nasrallah, Gheyath K.; Al-Kuwari, Mohamed Ghaith; Al-Romaihi, Hamad Eid; Butt, Adeel A.; Al-Thani, Mohamed H.; Al-Khal, Abdullatif; Bertollini, Roberto; Abu-Raddad, Laith J.... more authors ... less authors ( Elsevier , 2023 , Other)COVID-19 vaccine antigen dose might affect protection against SARS-CoV-2 infection,1, 2 but direct evidence to quantify this effect is absent. We conducted a matched, retrospective, cohort study using a regression ... -
Characterizing the effective reproduction number during the COVID-19 pandemic: Insights from Qatar's experience
Bsat, Raghid; Chemaitelly, Hiam; Coyle, Peter; Tang, Patrick; Hasan, Mohammad R.; Kanaani, Zaina Al; Kuwari, Einas Al; Butt, Adeel A.; Jeremijenko, Andrew; Kaleeckal, Anvar Hassan; Latif, Ali Nizar; Shaik, Riyazuddin Mohammad; Nasrallah, Gheyath K.; Benslimane, Fatiha M.; Khatib, Hebah A.Al; Yassine, Hadi M.; Kuwari, Mohamed G.Al; Romaihi, Hamad Eid Al; Al-Thani, Mohamed H.; Khal, Abdullatif Al; Bertollini, Roberto; Abu-Raddad, Laith J.; Ayoub, Houssein H.... more authors ... less authors ( Edinburgh University Global Health Society , 2022 , Article)Background The effective reproduction number, Rt, is a tool to track and understand pandemic dynamics. This investigation of Rt estimations was conducted to guide the national COVID-19 response in Qatar, from the onset of ... -
Covid-19 Vaccine Protection among Children and Adolescents in Qatar.
Chemaitelly, Hiam; AlMukdad, Sawsan; Ayoub, Houssein H; Altarawneh, Heba N; Coyle, Peter; Tang, Patrick; Yassine, Hadi M; Al-Khatib, Hebah A; Smatti, Maria K; Hasan, Mohammad R; Al-Kanaani, Zaina; Al-Kuwari, Einas; Jeremijenko, Andrew; Kaleeckal, Anvar H; Latif, Ali N; Shaik, Riyazuddin M; Abdul-Rahim, Hanan F; Nasrallah, Gheyath K; Al-Kuwari, Mohamed G; Al-Romaihi, Hamad E; Butt, Adeel A; Al-Thani, Mohamed H; Al-Khal, Abdullatif; Bertollini, Roberto; Abu-Raddad, Laith J... more authors ... less authors ( Massachusetts Medical Society , 2022 , Article)The BNT162b2 vaccine against coronavirus disease 2019 (Covid-19) has been authorized for use in children 5 to 11 years of age and adolescents 12 to 17 years of age but in different antigen doses. We assessed the real-world ... -
Duration of immune protection of SARS-CoV-2 natural infection against reinfection.
Chemaitelly, Hiam; Nagelkerke, Nico; Ayoub, Houssein H; Coyle, Peter; Tang, Patrick; Yassine, Hadi M; Al-Khatib, Hebah A; Smatti, Maria K; Hasan, Mohammad R; Al-Kanaani, Zaina; Al-Kuwari, Einas; Jeremijenko, Andrew; Kaleeckal, Anvar Hassan; Latif, Ali Nizar; Shaik, Riyazuddin Mohammad; Abdul-Rahim, Hanan F; Nasrallah, Gheyath K; Al-Kuwari, Mohamed Ghaith; Butt, Adeel A; Al-Romaihi, Hamad Eid; Al-Thani, Mohamed H; Al-Khal, Abdullatif; Bertollini, Roberto; Abu-Raddad, Laith J... more authors ... less authors ( Oxford University Press , 2022 , Article)The future of the SARS-CoV-2 pandemic hinges on virus evolution and duration of immune protection of natural infection against reinfection. We investigated duration of protection afforded by natural infection, the effect ... -
Duration of mRNA vaccine protection against SARS-CoV-2 Omicron BA.1 and BA.2 subvariants in Qatar.
Chemaitelly, Hiam; Ayoub, Houssein H; AlMukdad, Sawsan; Coyle, Peter; Tang, Patrick; Yassine, Hadi M; Al-Khatib, Hebah A; Smatti, Maria K; Hasan, Mohammad R; Al-Kanaani, Zaina; Al-Kuwari, Einas; Jeremijenko, Andrew; Kaleeckal, Anvar Hassan; Latif, Ali Nizar; Shaik, Riyazuddin Mohammad; Abdul-Rahim, Hanan F; Nasrallah, Gheyath K; Al-Kuwari, Mohamed Ghaith; Butt, Adeel A; Al-Romaihi, Hamad Eid; Al-Thani, Mohamed H; Al-Khal, Abdullatif; Bertollini, Roberto; Abu-Raddad, Laith J... more authors ... less authors ( Nature Research , 2022 , Article)SARS-CoV-2 Omicron BA.1 and BA.2 subvariants are genetically divergent. We conducted a matched, test-negative, case-control study to estimate duration of protection of the second and third/booster doses of mRNA COVID-19 ... -
Effect of mRNA Vaccine Boosters against SARS-CoV-2 Omicron Infection in Qatar.
Abu-Raddad, Laith J; Chemaitelly, Hiam; Ayoub, Houssein H; AlMukdad, Sawsan; Yassine, Hadi M; Al-Khatib, Hebah A; Smatti, Maria K; Tang, Patrick; Hasan, Mohammad R; Coyle, Peter; Al-Kanaani, Zaina; Al-Kuwari, Einas; Jeremijenko, Andrew; Kaleeckal, Anvar H; Latif, Ali N; Shaik, Riyazuddin M; Abdul-Rahim, Hanan F; Nasrallah, Gheyath K; Al-Kuwari, Mohamed Ghaith; Butt, Adeel A; Al-Romaihi, Hamad Eid; Al-Thani, Mohamed H; Al-Khal, Abdullatif; Bertollini, Roberto... more authors ... less authors ( Massachusetts Medical Society , 2022 , Article)Waning of vaccine protection against coronavirus disease 2019 (Covid-19) and the emergence of the omicron (or B.1.1.529) variant of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) have led to expedited ... -
Effectiveness of influenza vaccination against SARS-CoV-2 infection among healthcare workers in Qatar
Elias, Tayar; Abdeen, Sami; Abed Alah, Muna; Chemaitelly, Hiam; Bougmiza, Iheb; Ayoub, Houssein H.; Kaleeckal, Anvar Hassan; Latif, Ali Nizar; Shaik, Riyazuddin Mohammad; Al-Romaihi, Hamad Eid; Al-Thani, Mohamed H.; Bertollini, Roberto; Abu-Raddad, Laith J.; Al-Khal, Abdullatif... more authors ... less authors ( Elsevier , 2023 , Article)BackgroundSome studies have reported that influenza vaccination is associated with lower risk of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection and/or coronavirus disease 2019 (COVID-19) morbidity ... -
Effectiveness of the neutralizing antibody sotrovimab among high-risk patients with mild-to-moderate SARS-CoV-2 in Qatar
Ahmed, Zaqout; Almaslamani, Muna A.; Chemaitelly, Hiam; Hashim, Samar A.; Ittaman, Ajithkumar; Alimam, Abeir; Rustom, Fatma; Daghfal, Joanne; Abukhattab, Mohammed; AlMukdad, Sawsan; Kaleeckal, Anvar Hassan; Latif, Ali Nizar; Butt, Adeel A.; Bertollini, Roberto; Al-Khal, Abdullatif; Omrani, Ali S.; Abu-Raddad, Laith J.... more authors ... less authors ( Elsevier , 2022 , Article)ObjectivesTo estimate the real-world effectiveness of sotrovimab against severe, critical, or fatal COVID-19 in Qatar at a time in which most SARS-CoV-2 incidences occurred due to the BA.2 Omicron subvariant. MethodsWe ... -
Effectiveness of two and three doses of COVID-19 mRNA vaccines against infection, symptoms, and severity in the pre-omicron era: A time-dependent gradient
Layan, Sukik; Chemaitelly, Hiam; Ayoub, Houssein H.; Coyle, Peter; Tang, Patrick; Yassine, Hadi M.; Al Thani, Asmaa A.; Hasan, Mohammad R.; Al-Kanaani, Zaina; Al-Kuwari, Einas; Jeremijenko, Andrew; Kaleeckal, Anvar Hassan; Latif, Ali Nizar; Shaik, Riyazuddin Mohammad; Abdul-Rahim, Hanan F.; Nasrallah, Gheyath K.; Al-Kuwari, Mohamed Ghaith; Butt, Adeel A.; Al-Romaihi, Hamad Eid; Al-Thani, Mohamed H.; Al-Khal, Abdullatif; Bertollini, Roberto; Abdel-Rahman, Manar E.; Abu-Raddad, Laith J.... more authors ... less authors ( Elsevier , 2024 , Article)BackgroundVaccines were developed and deployed to combat severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. This study aimed to characterize patterns in the protection provided by the BNT162b2 and ... -
Effects of BA.1/BA.2 subvariant, vaccination, and prior infection on infectiousness of SARS-CoV-2 omicron infections.
Qassim, Suelen H; Chemaitelly, Hiam; Ayoub, Houssein H; AlMukdad, Sawsan; Tang, Patrick; Hasan, Mohammad R; Yassine, Hadi M; Al-Khatib, Hebah A; Smatti, Maria K; Abdul-Rahim, Hanan F; Nasrallah, Gheyath K; Al-Kuwari, Mohamed Ghaith; Al-Khal, Abdullatif; Coyle, Peter; Kaleeckal, Anvar Hassan; Shaik, Riyazuddin Mohammad; Latif, Ali Nizar; Al-Kuwari, Einas; Jeremijenko, Andrew; Butt, Adeel A; Bertollini, Roberto; Al-Romaihi, Hamad Eid; Al-Thani, Mohamed H; Abu-Raddad, Laith J... more authors ... less authors ( Oxford University Press , 2022 , Article)Compared to BA.1, BA.2 was associated with lower RT-qPCR cycle threshold (Ct) value-3.53 fewer cycles (95% CI: 3.46-3.60), signifying higher infectiousness. This may reflect higher viral load and/or longer duration of ... -
Effects of Previous Infection and Vaccination on Symptomatic Omicron Infections.
Altarawneh, Heba N; Chemaitelly, Hiam; Ayoub, Houssein H; Tang, Patrick; Hasan, Mohammad R; Yassine, Hadi M; Al-Khatib, Hebah A; Smatti, Maria K; Coyle, Peter; Al-Kanaani, Zaina; Al-Kuwari, Einas; Jeremijenko, Andrew; Kaleeckal, Anvar H; Latif, Ali N; Shaik, Riyazuddin M; Abdul-Rahim, Hanan F; Nasrallah, Gheyath K; Al-Kuwari, Mohamed G; Butt, Adeel A; Al-Romaihi, Hamad E; Al-Thani, Mohamed H; Al-Khal, Abdullatif; Bertollini, Roberto; Abu-Raddad, Laith J... more authors ... less authors ( Massachusetts Medical Society , 2022 , Article)The protection conferred by natural immunity, vaccination, and both against symptomatic severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection with the BA.1 or BA.2 sublineages of the omicron (B.1.1.529) ... -
Effects of previous infection, vaccination, and hybrid immunity against symptomatic Alpha, Beta, and Delta SARS-CoV-2 infections: an observational study
Heba N., Altarawneh; Chemaitelly, Hiam; Ayoub, Houssein H.; Tang, Patrick; Hasan, Mohammad R.; Yassine, Hadi M.; Al-Khatib, Hebah A.; Al Thani, Asmaa A.; Coyle, Peter; Al-Kanaani, Zaina; Al-Kuwari, Einas; Jeremijenko, Andrew; Kaleeckal, Anvar Hassan; Latif, Ali Nizar; Shaik, Riyazuddin Mohammad; Abdul-Rahim, Hanan F.; Nasrallah, Gheyath K.; Al-Kuwari, Mohamed Ghaith; Butt, Adeel A.; Al-Romaihi, Hamad Eid; Al-Thani, Mohamed H.; Al-Khal, Abdullatif; Bertollini, Roberto; Abu-Raddad, Laith J.... more authors ... less authors ( Elsevier , 2023 , Article)BackgroundProtection against SARS-CoV-2 symptomatic infection and severe COVID-19 of previous infection, mRNA two-dose vaccination, mRNA three-dose vaccination, and hybrid immunity of previous infection and vaccination ... -
Effects of SARS-CoV-2 Alpha, Beta, and Delta variants, age, vaccination, and prior infection on infectiousness of SARS-CoV-2 infections
Qassim, Suelen H.; Hasan, Mohammad R.; Tang, Patrick; Chemaitelly, Hiam; Ayoub, Houssein H.; Yassine, Hadi M.; Al-Khatib, Hebah A.; Smatti, Maria K.; Abdul-Rahim, Hanan F.; Nasrallah, Gheyath K.; Al-Kuwari, Mohamed Ghaith; Al-Khal, Abdullatif; Coyle, Peter; Gillani, Imtiaz; Kaleeckal, Anvar Hassan; Shaik, Riyazuddin Mohammad; Latif, Ali Nizar; Al-Kuwari, Einas; Jeremijenko, Andrew; Butt, Adeel A.; Bertollini, Roberto; Al-Romaihi, Hamad Eid; Al-Thani, Mohamed H.; Abu-Raddad, Laith J.... more authors ... less authors ( Frontiers Media , 2022 , Article)In 2021, Qatar experienced considerable incidence of SARS-CoV-2 infection that was dominated sequentially by the Alpha, Beta, and Delta variants. Using the cycle threshold (Ct) value of an RT-qPCR-positive test to proxy ... -
Epidemiological impact of prioritising SARS-CoV-2 vaccination by antibody status: Mathematical modelling analyses
Ayoub, H.H.; Ayoub, Houssein H.; Chemaitelly, Hiam; Makhoul, Monia; Al Kanaani, Zaina; Al Kuwari, Einas; Butt, Adeel A.; Coyle, Peter; Jeremijenko, Andrew; Kaleeckal, Anvar Hassan; Latif, Ali Nizar; Shaik, Riyazuddin Mohammad; Abdul Rahim, Hanan F.; Nasrallah, Gheyath K.; Yassine, Hadi M.; Al Kuwari, Mohamed G.; Al Romaihi, Hamad Eid; Al-Thani, Mohamed H.; Bertollini, Roberto; Al Khal, Abdullatif; Abu-Raddad, Laith J.... more authors ... less authors ( BMJ Publishing Group , 2021 , Article)Background Vaccines against SARS-CoV-2 have been developed, but their availability falls far short of global needs. This study aimed to investigate the impact of prioritising available doses on the basis of recipient ... -
Epidemiological investigation of the first 5685 cases of SARS-CoV-2 infection in Qatar, 28 February-18 April 2020
Al Kuwari, Hanan M.; Abdul Rahim, Hanan F.; Abu-Raddad, Laith J.; Abou-Samra, Abdul Badi; Al Kanaani, Zaina; Al Khal, Abdullatif; Al Kuwari, Einas; Al Marri, Salih; Al Masalmani, Muna; Al Romaihi, Hamad E.; Al Thani, Mohamed H.; Coyle, Peter V.; Latif, Ali N.; Owen, Robert; Bertollini, Roberto; Butt, Adeel Ajwad... more authors ... less authors ( BMJ Publishing Group , 2020 , Article)© Authors 2020 Objective To define the epidemiological curve of COVID-19 in Qatar and determine factors associated with severe or critical illness. Design Case series of first 5685 COVID-19 cases in Qatar. Setting and ... -
Estimating protection afforded by prior infection in preventing reinfection: Applying the test-negative study design.
Ayoub, Houssein H; Tomy, Milan; Chemaitelly, Hiam; Altarawneh, Heba N; Coyle, Peter; Tang, Patrick; Hasan, Mohammad R; Al Kanaani, Zaina; Al Kuwari, Einas; Butt, Adeel A; Jeremijenko, Andrew; Kaleeckal, Anvar Hassan; Latif, Ali Nizar; Shaik, Riyazuddin Mohammad; Nasrallah, Gheyath K; Benslimane, Fatiha M; Al Khatib, Hebah A; Yassine, Hadi M; Al Kuwari, Mohamed G; Al Romaihi, Hamad Eid; Abdul-Rahim, Hanan F; Al-Thani, Mohamed H; Al Khal, Abdullatif; Bertollini, Roberto; Abu-Raddad, Laith J... more authors ... less authors ( Oxford University Press , 2023 , Article)The COVID-19 pandemic has highlighted the need to use infection testing databases to rapidly estimate effectiveness of prior infection in preventing reinfection ($P{E}_S$) by novel SARS-CoV-2 variants. Mathematical modeling ...