The virus doesn't need to insert its sequences into the genome. There are different types of virus, and some do (retroviruses) and others don't. It can be perf

The virus doesn't need to insert its sequences into the genome. There are different types of virus, and some do (retroviruses) and others don't. It can be perfectly fine to have the dna floating around in the nucleus or even the cell body to turn it into a protein. Exceptions abound, of course...