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Is the SARS CoV-2 Omicron Variant Deadlier and More Transmissible Than Delta Variant?

Author

Listed:
  • Bao V. Duong

    (School of Mechanical and Mechatronic Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia)

  • Puchanee Larpruenrudee

    (School of Mechanical and Mechatronic Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia)

  • Tianxin Fang

    (School of Mechanical and Mechatronic Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia)

  • Sheikh I. Hossain

    (School of Life Sciences, University of Technology Sydney, Ultimo, NSW 2007, Australia)

  • Suvash C. Saha

    (School of Mechanical and Mechatronic Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia)

  • Yuantong Gu

    (School of Mechanical, Medical and Process Engineering, Faculty of Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia)

  • Mohammad S. Islam

    (School of Mechanical and Mechatronic Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia)

Abstract

Genetic variants of severe acute respiratory syndrome coronavirus (SARS-CoV-2) have been globally surging and devastating many countries around the world. There are at least eleven reported variants dedicated with inevitably catastrophic consequences. In 2021, the most dominant Delta and Omicron variants were estimated to lead to more severity and deaths than other variants. Furthermore, these variants have some contagious characteristics involving high transmissibility, more severe illness, and an increased mortality rate. All outbreaks caused by the Delta variant have been rapidly skyrocketing in infection cases in communities despite tough restrictions in 2021. Apart from it, the United States, the United Kingdom and other high-rate vaccination rollout countries are still wrestling with this trend because the Delta variant can result in a significant number of breakthrough infections. However, the pandemic has changed since the latest SARS-CoV-2 variant in late 2021 in South Africa, Omicron. The preliminary data suggest that the Omicron variant possesses 100-fold greater than the Delta variant in transmissibility. Therefore, this paper aims to review these characteristics based on the available meta-data and information from the first emergence to recent days. Australia and the five most affected countries, including the United States, India, Brazil, France, as well as the United Kingdom, are selected in order to review the transmissibility, severity and fatality due to Delta and Omicron variants. Finally, the vaccination programs for each country are also reviewed as the main factor in prevention.

Suggested Citation

  • Bao V. Duong & Puchanee Larpruenrudee & Tianxin Fang & Sheikh I. Hossain & Suvash C. Saha & Yuantong Gu & Mohammad S. Islam, 2022. "Is the SARS CoV-2 Omicron Variant Deadlier and More Transmissible Than Delta Variant?," IJERPH, MDPI, vol. 19(8), pages 1-25, April.
  • Handle: RePEc:gam:jijerp:v:19:y:2022:i:8:p:4586-:d:791416
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    References listed on IDEAS

    as
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    3. Mohammad S. Islam & Puchanee Larpruenrudee & Sheikh I. Hossain & Mohammad Rahimi-Gorji & Yuantong Gu & Suvash C. Saha & Gunther Paul, 2021. "Polydisperse Aerosol Transport and Deposition in Upper Airways of Age-Specific Lung," IJERPH, MDPI, vol. 18(12), pages 1-17, June.
    4. Michael Hendryx & Mohammad Saidul Islam & Guang-Hui Dong & Gunther Paul, 2020. "Air Pollution Emissions 2008–2018 from Australian Coal Mining: Implications for Public and Occupational Health," IJERPH, MDPI, vol. 17(5), pages 1-11, February.
    5. Yuan Liu & Zhi Ning & Yu Chen & Ming Guo & Yingle Liu & Nirmal Kumar Gali & Li Sun & Yusen Duan & Jing Cai & Dane Westerdahl & Xinjin Liu & Ke Xu & Kin-fai Ho & Haidong Kan & Qingyan Fu & Ke Lan, 2020. "Aerodynamic analysis of SARS-CoV-2 in two Wuhan hospitals," Nature, Nature, vol. 582(7813), pages 557-560, June.
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    Cited by:

    1. Wang Xiang & Li Chen & Qunjie Peng & Bing Wang & Xiaobing Liu, 2022. "How Effective Is a Traffic Control Policy in Blocking the Spread of COVID-19? A Case Study of Changsha, China," IJERPH, MDPI, vol. 19(13), pages 1-17, June.
    2. Min Du & Yirui Ma & Jie Deng & Min Liu & Jue Liu, 2022. "Comparison of Long COVID-19 Caused by Different SARS-CoV-2 Strains: A Systematic Review and Meta-Analysis," IJERPH, MDPI, vol. 19(23), pages 1-15, November.
    3. Priscilla Gomes da Silva & José Gonçalves & Andrés Torres Franco & Elisa Rodriguez & Israel Diaz & Antonio Orduña Domingo & Sonsoles Garcinuño Pérez & Gabriel Alberto March Roselló & Carlos Jesús Dueñ, 2023. "Environmental Dissemination of SARS-CoV-2 in a University Hospital during the COVID-19 5th Wave Delta Variant Peak in Castile-León, Spain," IJERPH, MDPI, vol. 20(2), pages 1-11, January.

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