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Herd Immunity against Severe Acute Respiratory Syndrome Coronavirus 2 Infection in 10 Communities, Qatar.

ABSTRACT: We investigated what proportion of the population acquired severe acute respiratory syndrome coronavirus 2 (SARS-CoV-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%). Specific communities in Qatar have or nearly reached herd immunity for SARS-CoV-2 infection: 65%-70% of the population has been infected.

SUBMITTER: Jeremijenko A 

PROVIDER: S-EPMC8084480 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature

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Herd Immunity against Severe Acute Respiratory Syndrome Coronavirus 2 Infection in 10 Communities, Qatar.

Jeremijenko Andrew A   Chemaitelly Hiam H   Ayoub Houssein H HH   Alishaq Moza M   Abou-Samra Abdul-Badi AB   Al Ajmi Jameela Ali A A JAAA   Al Ansari Nasser Ali Asad NAA   Al Kanaani Zaina Z   Al Khal Abdullatif A   Al Kuwari Einas E   Al-Mohammed Ahmed A   Al Molawi Naema Hassan Abdulla NHA   Al Naomi Huda Mohamad HM   Butt Adeel A AA   Coyle Peter P   El Kahlout Reham Awni RA   Gillani Imtiaz I   Kaleeckal Anvar Hassan AH   Masoodi Naseer Ahmad NA   Thomas Anil George AG   Nafady-Hego Hanaa H   Latif Ali Nizar AN   Shaik Riyazuddin Mohammad RM   Younes Nourah B M NBM   Rahim Hanan F Abdul HFA   Yassine Hadi M HM   Al Kuwari Mohamed G MG   Al Romaihi Hamad Eid HE   Al-Thani Mohamed H MH   Bertollini Roberto R   Abu-Raddad Laith J LJ  

Emerging infectious diseases 20210501 5

We investigated what proportion of the population acquired severe acute respiratory syndrome coronavirus 2 (SARS-CoV-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 poo  ...[more]