The reproductive number of the Delta variant of SARS-CoV-2 is far higher compared to the ancestral SARS-CoV-2 virus

doi:10.1093/jtm/taab124

. 2021 Oct 11;28(7):taab124.

doi: 10.1093/jtm/taab124.

The reproductive number of the Delta variant of SARS-CoV-2 is far higher compared to the ancestral SARS-CoV-2 virus

Ying Liu¹, Joacim Rocklöv²

Affiliations

¹ School of International Business, Xiamen University Tan Kah Kee College, Zhangzhou 363105, China.
² Section of Sustainable Health, Department of Public Health and Clinical Medicine, Umeå University, Umeå SE-90187, Sweden.

PMID: 34369565
PMCID: PMC8436367
DOI: 10.1093/jtm/taab124

The reproductive number of the Delta variant of SARS-CoV-2 is far higher compared to the ancestral SARS-CoV-2 virus

Ying Liu et al. J Travel Med. 2021.

. 2021 Oct 11;28(7):taab124.

doi: 10.1093/jtm/taab124.

Authors

Ying Liu¹, Joacim Rocklöv²

Affiliations

¹ School of International Business, Xiamen University Tan Kah Kee College, Zhangzhou 363105, China.
² Section of Sustainable Health, Department of Public Health and Clinical Medicine, Umeå University, Umeå SE-90187, Sweden.

PMID: 34369565
PMCID: PMC8436367
DOI: 10.1093/jtm/taab124

Abstract

The Delta variant is now replacing all other SARS-CoV-2 variants. We found a mean R₀ of 5.08, which is much higher than the R₀ of the ancestral strain of 2.79. Rapidly ramping up vaccine coverage rates while enhancing public health and social measures is now even more urgent and important.

Keywords: Alpha variant; B1.617.2; COVID-19; Delta variant; R0; SARS-CoV-2; Wuhan; basic reproductive number; epidemic potential; pandemic; transmissibility; variants of concerns.

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References

1. Davies NG, Abbott S, Barnard RC et al. Estimated transmissibility and impact of SARS-CoV-2 lineage B. 1.1. 7 in England. Science 2021; 372:eabg3055. doi: 10.1126/science.abg3055. - DOI - PMC - PubMed
1. Liu Y, Gayle AA, Wilder-Smith A, Rocklöv J. The reproductive number of COVID-19 is higher compared to SARS coronavirus. J Travel Med 2020; 27:taaa021. 10.1093/jtm/taaa021. - DOI - PMC - PubMed
1. Centers for Disease Control and Prevention (CDC) . Improving Communications Around Vaccine Breakthrough and Vaccine Effectiveness. https://context-cdn.washingtonpost.com/notes/prod/default/documents/54f5... (29 July 2021, date last accessed).
1. Petra Mlcochova, Steven Kemp, Mahesh Shanker Dhar, et al. . SARS-CoV-2 B.1.617.2 Delta variant emergence and vaccine breakthrough. bioRxiv 2021. doi: 10.1101/2021.05.08.443253. - DOI
1. Ong SWX, Chiew CJ, Ang LW et al. Clinical and virological features of SARS-CoV-2 variants of concern: a retrospective cohort study comparing B.1.1.7 (Alpha), B.1.315 (Beta), and B.1.617.2 (Delta). Preprints with THE LANCET. Available at SSRN: https://ssrn.com/abstract=3861566 or 10.2139/ssrn.3861566 (8 January 2021, date last accessed). - DOI

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[1] Davies NG, Abbott S, Barnard RC et al. Estimated transmissibility and impact of SARS-CoV-2 lineage B. 1.1. 7 in England. Science 2021; 372:eabg3055. doi: 10.1126/science.abg3055. - DOI - PMC - PubMed

[2] Davies NG, Abbott S, Barnard RC et al. Estimated transmissibility and impact of SARS-CoV-2 lineage B. 1.1. 7 in England. Science 2021; 372:eabg3055. doi: 10.1126/science.abg3055. - DOI - PMC - PubMed

[3] Liu Y, Gayle AA, Wilder-Smith A, Rocklöv J. The reproductive number of COVID-19 is higher compared to SARS coronavirus. J Travel Med 2020; 27:taaa021. 10.1093/jtm/taaa021. - DOI - PMC - PubMed

[4] Liu Y, Gayle AA, Wilder-Smith A, Rocklöv J. The reproductive number of COVID-19 is higher compared to SARS coronavirus. J Travel Med 2020; 27:taaa021. 10.1093/jtm/taaa021. - DOI - PMC - PubMed

[5] Centers for Disease Control and Prevention (CDC) . Improving Communications Around Vaccine Breakthrough and Vaccine Effectiveness. https://context-cdn.washingtonpost.com/notes/prod/default/documents/54f5... (29 July 2021, date last accessed).

[6] Centers for Disease Control and Prevention (CDC) . Improving Communications Around Vaccine Breakthrough and Vaccine Effectiveness. https://context-cdn.washingtonpost.com/notes/prod/default/documents/54f5... (29 July 2021, date last accessed).

[7] Petra Mlcochova, Steven Kemp, Mahesh Shanker Dhar, et al. . SARS-CoV-2 B.1.617.2 Delta variant emergence and vaccine breakthrough. bioRxiv 2021. doi: 10.1101/2021.05.08.443253. - DOI

[8] Petra Mlcochova, Steven Kemp, Mahesh Shanker Dhar, et al. . SARS-CoV-2 B.1.617.2 Delta variant emergence and vaccine breakthrough. bioRxiv 2021. doi: 10.1101/2021.05.08.443253. - DOI

[9] Ong SWX, Chiew CJ, Ang LW et al. Clinical and virological features of SARS-CoV-2 variants of concern: a retrospective cohort study comparing B.1.1.7 (Alpha), B.1.315 (Beta), and B.1.617.2 (Delta). Preprints with THE LANCET. Available at SSRN: https://ssrn.com/abstract=3861566 or 10.2139/ssrn.3861566 (8 January 2021, date last accessed). - DOI

[10] Ong SWX, Chiew CJ, Ang LW et al. Clinical and virological features of SARS-CoV-2 variants of concern: a retrospective cohort study comparing B.1.1.7 (Alpha), B.1.315 (Beta), and B.1.617.2 (Delta). Preprints with THE LANCET. Available at SSRN: https://ssrn.com/abstract=3861566 or 10.2139/ssrn.3861566 (8 January 2021, date last accessed). - DOI

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The reproductive number of the Delta variant of SARS-CoV-2 is far higher compared to the ancestral SARS-CoV-2 virus

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The reproductive number of the Delta variant of SARS-CoV-2 is far higher compared to the ancestral SARS-CoV-2 virus

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