CORONAVIRUS COVID-19

COVID-19 pandemic-the COVID-19 coronavirus pandemic caused by SARS-CoV-2 coronavirus Began with the discovery in late December 2019 in the city of Wuhan, Hubei province of Central China, of the first cases of pneumonia of unknown origin in local residents associated with the local animal and seafood market of huangan. On December 31, 2019, the Chinese authorities informed the world health organization (who) of an outbreak of unknown pneumonia. Since January 22, the city of Wuhan has been closed for quarantine; since January 24, The surrounding urban districts have been closed. The virus was detected in all administrative divisions of China at the provincial level. On January 30, who recognized the new coronavirus outbreak as a public health emergency of international significance. On February 11, 2020, the disease was named a new coronavirus disease (COVID-2019). Chinese scientists have isolated the pathogen-a new coronavirus and established a genetic link between the sequence of its genome. The virus is at least 70% similar in genetic sequence to the SARS-CoV virus that causes severe acute respiratory syndrome (also known as atypical pneumonia) and is therefore called SARS-CoV-2. The incubation period is usually about 5 days, but can last from 2 to 14 days. The disease becomes contagious before symptoms appear.