Abstract:

COVID-19 is a new strain of coronavirus to which humans have not got immunity. It originated in China and has quickly spread around the world.It is a disease caused by an infection by SARS-CoV-2 virus, first identified in the city of Wuhan, in Chinas Hubei province in December 2019. COVID-19 was previously known as 2019 Novel Coronavirus (2019-nCoV) respiratory disease before the World Health Organization (WHO) declared the official name as COVID-19 in February 2020. Like the other coronaviruses, the SARS-CoV-2 virus primarily causes respiratory tract infections, and the severity of the COVID-19 disease can range from mild to fatal.

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