COVID-19 is an acronym that stands for coronavirus disease of 2019. The World Health Organization (WHO) has officially named the disease COVID-19 and the virus that causes the disease as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)
Source — https://www.who.int/emergencies/diseases/novel-coronavirus-2019/technical-guidance/naming-the-coronavirus-disease-(covid-2019)-and-the-virus-that-causes-it