COVID‐19: Epidemiology

Phillip Quiroz,George W. Rutherford,Michael P. Dube

COVID-19: Diagnosis and Management-Part I（2022）

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摘要

COVID-19, the disease caused by SARS-CoV-2, was first introduced to human populations in December, 2019. There was no pre-existing population immunity and thus the disease spread rapidly throughout the globe. Since its emergence, greater population level immunity has been acquired, notably through the advent of vaccines; however, newer COVID-19 variants have also resulted in increased transmissibility.

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epidemiology

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