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AuthorAbu-Raddad, Laith J.
AuthorChemaitelly, Hiam
AuthorAyoub, Houssein H.
AuthorAl Kanaani, Zaina
AuthorAl Khal, Abdullatif
AuthorAl Kuwari, Einas
AuthorButt, Adeel A.
AuthorCoyle, Peter
AuthorJeremijenko, Andrew
AuthorKaleeckal, Anvar Hassan
AuthorLatif, Ali Nizar
AuthorOwen, Robert C.
AuthorRahim, Hanan F.Abdul
AuthorAl Abdulla, Samya A.
AuthorAl Kuwari, Mohamed G.
AuthorKandy, Mujeeb C.
AuthorSaeb, Hatoun
AuthorAhmed, Shazia Nadeem N.
AuthorAl Romaihi, Hamad Eid
AuthorBansal, Devendra
AuthorDalton, Louise
AuthorAl-Thani, Mohamed H.
AuthorBertollini, Roberto
Available date2023-09-06T08:36:44Z
Publication Date2021-12-01
Publication NameScientific Reports
Identifierhttp://dx.doi.org/10.1038/s41598-021-85428-7
CitationAbu-Raddad, L. J., Chemaitelly, H., Ayoub, H. H., Al Kanaani, Z., Al Khal, A., Al Kuwari, E., ... & Bertollini, R. (2021). Characterizing the Qatar advanced-phase SARS-CoV-2 epidemic. Scientific reports, 11(1), 6233.‏
URIhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85102786615&origin=inward
URIhttp://hdl.handle.net/10576/47301
AbstractThe overarching objective of this study was to provide the descriptive epidemiology of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) epidemic in Qatar by addressing specific research questions through a series of national epidemiologic studies. Sources of data were the centralized and standardized national databases for SARS-CoV-2 infection. By July 10, 2020, 397,577 individuals had been tested for SARS-CoV-2 using polymerase-chain-reaction (PCR), of whom 110,986 were positive, a positivity cumulative rate of 27.9% (95% CI 27.8–28.1%). As of July 5, case severity rate, based on World Health Organization (WHO) severity classification, was 3.4% and case fatality rate was 1.4 per 1,000 persons. Age was by far the strongest predictor of severe, critical, or fatal infection. PCR positivity of nasopharyngeal/oropharyngeal swabs in a national community survey (May 6–7) including 1,307 participants was 14.9% (95% CI 11.5–19.0%); 58.5% of those testing positive were asymptomatic. Across 448 ad-hoc testing campaigns in workplaces and residential areas including 26,715 individuals, pooled mean PCR positivity was 15.6% (95% CI 13.7–17.7%). SARS-CoV-2 antibody prevalence was 24.0% (95% CI 23.3–24.6%) in 32,970 residual clinical blood specimens. Antibody prevalence was only 47.3% (95% CI 46.2–48.5%) in those who had at least one PCR positive result, but 91.3% (95% CI 89.5–92.9%) among those who were PCR positive > 3 weeks before serology testing. Qatar has experienced a large SARS-CoV-2 epidemic that is rapidly declining, apparently due to growing immunity levels in the population.
Languageen
Publisherspringer nature
Subjectqatar
advanced-phase SARS-CoV-2
TitleCharacterizing the Qatar advanced-phase SARS-CoV-2 epidemic
TypeArticle
Issue Number1
Volume Number11
dc.accessType Open Access


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