Technically speaking, the virus is "severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)." The disease you get from virus is "coronavirus disease (COVID-19)."
Many people incorrectly call the virus "COVID-19," but it's no big deal, everyone knows what you're talking about. I have to use the correct terminology because I'm in the drug development field. We generally just call it the "the virus."
Naming the coronavirus disease (COVID-19) and the virus that causes it.