Emergence of a novel human coronavirus threatening human health - Nature Medicine

In late December 2019, a cluster of patients with ‘atypical pneumonia’ of unknown etiology was reported in Wuhan, China. A novel human coronavirus, now provisionally called ‘SARS-CoV-2’, was identified as the cause of this disease, now named ‘COVID-19’.

https://www.nature.com/articles/s41591-020-0796-5