1
|
Dhar MS, Marwal R, Vs R, Ponnusamy K, Jolly B, Bhoyar RC, Sardana V, Naushin S, Rophina M, Mellan TA, Mishra S, Whittaker C, Fatihi S, Datta M, Singh P, Sharma U, Ujjainiya R, Bhatheja N, Divakar MK, Singh MK, Imran M, Senthivel V, Maurya R, Jha N, Mehta P, A V, Sharma P, Vr A, Chaudhary U, Soni N, Thukral L, Flaxman S, Bhatt S, Pandey R, Dash D, Faruq M, Lall H, Gogia H, Madan P, Kulkarni S, Chauhan H, Sengupta S, Kabra S, Gupta RK, Singh SK, Agrawal A, Rakshit P, Nandicoori V, Tallapaka KB, Sowpati DT, Thangaraj K, Bashyam MD, Dalal A, Sivasubbu S, Scaria V, Parida A, Raghav SK, Prasad P, Sarin A, Mayor S, Ramakrishnan U, Palakodeti D, Seshasayee ASN, Bhat M, Shouche Y, Pillai A, Dikid T, Das S, Maitra A, Chinnaswamy S, Biswas NK, Desai AS, Pattabiraman C, Manjunatha MV, Mani RS, Arunachal Udupi G, Abraham P, Atul PV, Cherian SS. Genomic characterization and epidemiology of an emerging SARS-CoV-2 variant in Delhi, India. Science 2021; 374:995-999. [PMID: 34648303 DOI: 10.1101/2021.06.02.21258076] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
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.
Collapse
Affiliation(s)
| | - Robin Marwal
- National Centre for Disease Control, Delhi, India
| | | | | | - Bani Jolly
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
- Academy for Scientific and Innovative Research, Ghaziabad, India
| | - Rahul C Bhoyar
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
| | - Viren Sardana
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
- Academy for Scientific and Innovative Research, Ghaziabad, India
| | - Salwa Naushin
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
- Academy for Scientific and Innovative Research, Ghaziabad, India
| | - Mercy Rophina
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
- Academy for Scientific and Innovative Research, Ghaziabad, India
| | - Thomas A Mellan
- Medical Research Council (MRC) Centre for Global Infectious Disease Analysis, Jameel Institute, School of Public Health, Imperial College London, London, UK
| | - Swapnil Mishra
- Medical Research Council (MRC) Centre for Global Infectious Disease Analysis, Jameel Institute, School of Public Health, Imperial College London, London, UK
| | - Charles Whittaker
- Medical Research Council (MRC) Centre for Global Infectious Disease Analysis, Jameel Institute, School of Public Health, Imperial College London, London, UK
| | - Saman Fatihi
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
- Academy for Scientific and Innovative Research, Ghaziabad, India
| | - Meena Datta
- National Centre for Disease Control, Delhi, India
| | | | - Uma Sharma
- National Centre for Disease Control, Delhi, India
| | - Rajat Ujjainiya
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
- Academy for Scientific and Innovative Research, Ghaziabad, India
| | - Nitin Bhatheja
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
| | - Mohit Kumar Divakar
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
- Academy for Scientific and Innovative Research, Ghaziabad, India
| | | | - Mohamed Imran
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
- Academy for Scientific and Innovative Research, Ghaziabad, India
| | - Vigneshwar Senthivel
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
- Academy for Scientific and Innovative Research, Ghaziabad, India
| | - Ranjeet Maurya
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
- Academy for Scientific and Innovative Research, Ghaziabad, India
| | - Neha Jha
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
| | - Priyanka Mehta
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
| | - Vivekanand A
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
- Academy for Scientific and Innovative Research, Ghaziabad, India
| | - Pooja Sharma
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
- Academy for Scientific and Innovative Research, Ghaziabad, India
| | - Arvinden Vr
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
- Academy for Scientific and Innovative Research, Ghaziabad, India
| | | | - Namita Soni
- National Centre for Disease Control, Delhi, India
| | - Lipi Thukral
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
- Academy for Scientific and Innovative Research, Ghaziabad, India
| | - Seth Flaxman
- Department of Mathematics, Imperial College London, London, UK
| | - Samir Bhatt
- Medical Research Council (MRC) Centre for Global Infectious Disease Analysis, Jameel Institute, School of Public Health, Imperial College London, London, UK
- Section of Epidemiology, Department of Public Health, University of Copenhagen, Copenhagen, Denmark
| | - Rajesh Pandey
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
- Academy for Scientific and Innovative Research, Ghaziabad, India
| | - Debasis Dash
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
- Academy for Scientific and Innovative Research, Ghaziabad, India
| | - Mohammed Faruq
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
- Academy for Scientific and Innovative Research, Ghaziabad, India
| | - Hemlata Lall
- National Centre for Disease Control, Delhi, India
| | - Hema Gogia
- National Centre for Disease Control, Delhi, India
| | - Preeti Madan
- National Centre for Disease Control, Delhi, India
| | | | | | - Shantanu Sengupta
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
- Academy for Scientific and Innovative Research, Ghaziabad, India
| | | | - Ravindra K Gupta
- Department of Medicine, Cambridge Institute of Therapeutic Immunology and Infectious Disease (CITIID), University of Cambridge, Cambridge, UK
- Africa Health Research Institute, KwaZulu-Natal, South Africa
| | | | - Anurag Agrawal
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
- Academy for Scientific and Innovative Research, Ghaziabad, India
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|