Key result
SARS-CoV-2 emerged in December 2019 and spread globally, resulting in more than 4 million deaths and a severe economic crisis.
Necessitates sustained pandemic preparedness in practice; confirms early spread data for modeling studies.
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the cause of coronavirus disease 2019 (COVID-19), emerged in China in December 2019 and quickly spread around the globe, killing more than 4 million people and causing a severe economic crisis. ...Read More
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Bigger et al. (1984) studied this question. SARS-CoV-2 emerged in December 2019 and spread globally, resulting in more than 4 million deaths and a severe economic crisis.
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