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The Emergence and Evolution of SARS-CoV-2
1Sydney Institute for Infectious Diseases, School of Medical Sciences, The University of Sydney, Sydney, New South Wales, Australia;
Annual Review of Virology
|April 17, 2024
Summary
Scientific evidence indicates SARS-CoV-2 (Severe Acute Respiratory Syndrome Coronavirus 2) likely originated naturally from the Huanan Seafood Wholesale Market. This review finds no direct evidence supporting a lab leak, emphasizing lessons learned to prevent future zoonotic pandemics.
Area of Science:
- Virology
- Epidemiology
- Public Health
Background:
- The origin of SARS-CoV-2 remains a subject of intense debate and speculation.
- Understanding the emergence of SARS-CoV-2 is critical for preventing future pandemics.
Purpose of the Study:
- To review the scientific evidence concerning the origin and spread of SARS-CoV-2.
- To evaluate the likelihood of natural zoonotic emergence versus laboratory origin.
- To discuss the implications for future pandemic preparedness.
Main Methods:
- Review of existing scientific literature and data on SARS-CoV-2.
- Analysis of epidemiological and genomic evidence related to early cases.
- Assessment of evidence for and against different origin hypotheses.
Main Results:
- Available data strongly suggest a natural zoonotic origin linked to the Huanan Seafood Wholesale Market in Wuhan.
- No direct evidence supports the hypothesis of SARS-CoV-2 emergence from laboratory work at the Wuhan Institute of Virology.
- The virus demonstrated gradual adaptation to humans, increasing transmissibility and virulence, and frequently transmitted to other animal species.
Conclusions:
- The scientific evidence favors a natural zoonotic origin for SARS-CoV-2.
- Failure to learn from this event risks future zoonotic epidemics and pandemics.
- Preventing future pandemics requires understanding and addressing the drivers of zoonotic spillover.
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