Genomic characterization and epidemiology of an emerging SARS-CoV-2 variant in Delhi, India

被引:211
作者
Dhar, Mahesh S. [1 ]
Marwal, Robin [1 ]
Radhakrishnan, V. S. [1 ]
Ponnusamy, Kalaiarasan [1 ]
Jolly, Bani [2 ,3 ]
Bhoyar, Rahul C. [2 ]
Sardana, Viren [2 ,3 ]
Naushin, Salwa [2 ,3 ]
Rophina, Mercy [2 ,3 ]
Mellan, Thomas A. [4 ]
Mishra, Swapnil [4 ]
Whittaker, Charles [4 ]
Fatihi, Saman [2 ,3 ]
Datta, Meena [1 ]
Singh, Priyanka [1 ]
Sharma, Uma [1 ]
Ujjainiya, Rajat [2 ,3 ]
Bhatheja, Nitin [2 ]
Divakar, Mohit Kumar [2 ,3 ]
Singh, Manoj K. [1 ]
Imran, Mohamed [2 ,3 ]
Senthivel, Vigneshwar [2 ,3 ]
Maurya, Ranjeet [2 ,3 ]
Jha, Neha [2 ]
Mehta, Priyanka [2 ]
Vivekanand, A. [2 ,3 ]
Sharma, Pooja [2 ,3 ]
Arvinden, V. R. [2 ,3 ]
Chaudhary, Urmila [1 ]
Soni, Namita [1 ]
Thukral, Lipi [2 ,3 ]
Flaxman, Seth [5 ]
Bhatt, Samir [4 ,6 ]
Pandey, Rajesh [2 ,3 ]
Dash, Debasis [2 ,3 ]
Faruq, Mohammed [2 ,3 ]
Lall, Hemlata [1 ]
Gogia, Hema [1 ]
Madan, Preeti [1 ]
Kulkarni, Sanket [1 ]
Chauhan, Himanshu [1 ]
Sengupta, Shantanu [2 ,3 ]
Kabra, Sandhya [1 ]
Gupta, Ravindra K. [7 ,8 ]
Singh, Sujeet K. [1 ]
Agrawal, Anurag [2 ,3 ]
Rakshit, Partha [1 ]
机构
[1] Natl Ctr Dis Control, Delhi, India
[2] CSIR Inst Genom & Integrat Biol, New Delhi, India
[3] Acad Sci & Innovat Res, Ghaziabad, India
[4] Imperial Coll London, Med Res Council MRC Ctr Global Infect Dis Anal, Sch Publ Hlth, Jameel Inst, London, England
[5] Imperial Coll London, Dept Math, London, England
[6] Univ Copenhagen, Dept Publ Hlth, Sect Epidemiol, Copenhagen, Denmark
[7] Univ Cambridge, Cambridge Inst Therapeut Immunol & Infect Dis CIT, Dept Med, Cambridge, England
[8] Africa Hlth Res Inst, Kwa Zulu, South Africa
基金
英国工程与自然科学研究理事会; 英国医学研究理事会;
关键词
HEALTH-CARE WORKERS; POPULATION;
D O I
10.1126/science.abj9932
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Delhi, the national capital of India, experienced multiple severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) outbreaks in 2020 and reached population seropositivity of >50% by 2021. During April 2021, the city became overwhelmed by COVID-19 cases and fatalities, as a new variant, B.1.617.2 (Delta), replaced B.1.1.7 (Alpha). A Bayesian model explains the growth advantage of Delta through a combination of increased transmissibility and reduced sensitivity to immune responses generated against earlier variants (median estimates: 1.5-fold greater transmissibility and 20% reduction in sensitivity). Seropositivity of an employee and family cohort increased from 42% to 87.5% between March and July 2021, with 27% reinfections, as judged by increased antibody concentration after a previous decline. The likely high transmissibility and partial evasion of immunity by the Delta variant contributed to an overwhelming surge in Delhi.
引用
收藏
页码:995 / +
页数:29
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