CO = corona; VI = virus; D = disease

COVID-19 = the novel coronavirus that arose in 2019

SARS-CoV-2 = severe acute respiratory syndrome coronavirus 2 (2 because it is genetically related to the SARS outbreak of '03)

... Words don't lie.

https://www.who.int/emergencies/diseases/novel-coronavirus-2019/technical-guidance/naming-the-coronavirus-disease-(covid-2019)-and-the-virus-that-causes-it