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Severity, criticality, and fatality of the SARS-CoV-2 Beta variant

Abu-Raddad, Laith J; Chemaitelly, Hiam; Ayoub, Houssein H; Yassine, Hadi M; Benslimane, Fatiha M; ... more authors ... less authors ( Oxford Academic , 2021 , Article)

Beta (B.1.351) variant COVID-19 disease was investigated in Qatar. Compared to Alpha (B.1.1.7) variant, odds of progressing to severe disease were 1.24-fold (95% CI: 1.11-1.39) higher for Beta. Odds of progressing to ...

Antibody Response to SARS-CoV-2: A Cohort Study in Qatar's Primary Care Settings.

Syed, Mohamed Ahmed; A/Qotba, Hamda Abdulla; Al Nuaimi, Ahmed Sameer; Nasrallah, Gheyath K; Althani, Asmaa Ali J F; ... more authors ... less authors ( SAGE Publications , 2021 , Article)

Globally, countries are rolling out Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) quarantine policies and vaccination programs. Research studies are needed in helping understand the likelihood of acquired ...

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; ... 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 ...

Demographic and Clinical Characteristics of Early Travel-Associated COVID-19 Cases

Marei, Reham M.; Emara, Mohamed M.; Elsaied, Omar M.; Nasrallah, Gheyath K.; Chivese, Tawanda; ... more authors ... less authors ( Frontiers Media , 2020 , Article)

© Copyright © 2020 Marei, Emara, Elsaied, Nasrallah, Chivese, Al-Romaihi, Althani, Al Thani, Farag and Yassine. Background: SARS-CoV-2 continues to claim hundreds of thousands of people's lives. It mostly affects the elderly ...

Severity, Criticality, and Fatality of the Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Beta Variant

Abu-Raddad, L.J.; Abu-Raddad, Laith J.; Chemaitelly, Hiam; Ayoub, Houssein H.; Yassine, Hadi M.; ... more authors ... less authors ( NLM (Medline) , 2022 , Article)

Beta (B.1.351)-variant coronavirus disease 2019 (COVID-19) disease was investigated in Qatar. Compared with the Alpha (B.1.1.7) variant, odds (95% confidence interval) of progressing to severe disease, critical disease, ...

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.; ... 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 ...

Duration of immune protection of SARS-CoV-2 natural infection against reinfection.

Chemaitelly, Hiam; Nagelkerke, Nico; Ayoub, Houssein H; Coyle, Peter; Tang, Patrick; ... 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 ...