In December 2019, a cluster of cases of pneumonia of unknown cause was detected in Wuhan City, Hubei Province of China. On 7th January 2020, Chinese authorities identified the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) as the causative virus and, on 11th February 2020, the World Health Organisation (WHO) named the disease coronavirus disease 2019 or COVID-19.
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