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    Herd immunity against severe acute respiratory syndrome coronavirus 2 infection in 10 communities, qatar

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    Date
    2021
    Author
    Jeremijenko, A.
    Chemaitelly, H.
    Ayoub, H.H.
    Alishaq, M.
    Abou-Samra, A.-B.
    Al Ajmi, J.A.A.A.
    Al Ansari, N.A.A.
    Al Kanaani, Z.
    Al Khal, A.
    Al Kuwari, E.
    Al-Mohammed, A.
    Al Molawi, N.H.A.
    Al Naomi, H.M.
    Butt, A.A.
    Coyle, P.
    El Kahlout, R.A.
    Gillani, I.
    Kaleeckal, A.H.
    Masoodi, N.A.
    Thomas, A.G.
    Nafady-Hego, H.
    Latif, A.N.
    Shaik, R.M.
    Younes, N.B.M.
    Abdul Rahim, H.F.
    Yassine, H.M.
    Al Kuwari, M.G.
    Al Romaihi, H.E.
    Al-Thani, M.H.
    Bertollini, R.
    Abu-Raddad, L.J.
    ...show more authors ...show less authors
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    Abstract
    We investigated what proportion of the population acquired severe acute respiratory syndrome coronavirus 2 (SARSCoV- 2) infection and whether the herd immunity threshold has been reached in 10 communities in Qatar. The study included 4,970 participants during June 21-September 9, 2020. Antibodies against SARS-CoV-2 were detected by using an electrochemiluminescence immunoassay. Seropositivity ranged from 54.9% (95% CI 50.2%-59.4%) to 83.8% (95% CI 79.1%-87.7%) across communities and showed a pooled mean of 66.1% (95% CI 61.5%-70.6%). A range of other epidemiologic measures indicated that active infection is rare, with limited if any sustainable infection transmission for clusters to occur. Only 5 infections were ever severe and 1 was critical in these young communities; infection severity rate of 0.2% (95% CI 0.1%-0.4%). Specifi c communities in Qatar have or nearly reached herd immunity for SARS-CoV-2 infection: 65%-70% of the population has been infected.
    DOI/handle
    http://dx.doi.org/10.3201/eid2705.204365
    http://hdl.handle.net/10576/47648
    Collections
    • COVID-19 Research [‎848‎ items ]
    • Mathematics, Statistics & Physics [‎786‎ items ]

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