I have a different understanding of viruses. All viruses attack host cells and "replaces" the healthy host RNA thereby using the host cell to reproduce the virus. When the virus runs out of healthy host cells, it is essentially done. The body develops antibodies that attack infected cells, which is how a vaccine works. Finding these antibodies is one of the most accurate tests to see who is infected.
We have developed effective vaccinations with live virus, then with dead virus, which takes a lot of time to grow live cultures, then kill them to make a vaccine. This particular vaccine is using the latest technology that doesn't rely on living and killed cultures, and to my knowledge this is the first human use.
Covid 19 is one of a family of coronaviruses, some of which are sources of the common cold and they are primarily hazardous from a respiratory aspect. While this is not a "common cold" it shares many traits with colds and flu. The most precarious thing about this virus is that few in the general population have developed antibodies for it. Since the impact on young people without compromised immune systems or underlying health issues is minimal; and some estimates say that up to 80% of the people who have it have no symptoms it will run the course of many viruses, people will develop immunity and the virus will fade as have many other serious viruses.
We were told HIV (virus) was mutating so quickly that it was going to become airborne and everyone would get it and die. That never happened and it remained within a specific segment of the population with specific behaviors.