Some RNA viruses use mRNA in their replication process but they have to infect the host cell first by binding to it's receptors. The virus then injects that mRNA into the cell where it can access the cell's internal mechanisms and instruct them to make the proteins required for virus replication.
So my question is how can the vaccine mRNA get inside the cell to access those internal mechanisms unless the vaccine is actually a virus too?
there doesn't seem to be anything here