You and a lot of people are confused about this and we will discuss it. The media, and some scientists also, are not doing a very good job of distinguishing the virus from the disease. Think about HIV and AIDS. HIV is a virus; AIDS is the disease that results from infection by the virus. SARS-CoV-2 is the official name of the virus; COVID-19 is the name of the disease. Sometimes you will hear the "COVID-19 virus" which is better but not quite the same as using the actual name of the virus.