Coronavirus, named due to the "crown" like the appearance of its surface<unk> ions, was first isolated from chickens in<unk> 37. The etiological agent, a novel coronavirus, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), named for the similarity of its symptoms to those induced by the severe acute respiratory syndrome, causing coronavirus disease 2019<unk> -19), is a virus identified as the cause of an outbreak of respiratory illness first detected in Wuhan, China. On March 12, 2020, the World Health Organization declared the<unk> -19 outbreak a pandemic.
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