Source: /cirosantilli/retrovirus

= Retrovirus
{tag=Positive-strand RNA virus}
{wiki}

Integrates its <RNA> genome into the host genome.
* first RNA to DNA with <reverse transcriptase>
* then injects DNA into host genome with <integrase>

Sounds complicated! The advantage is likely as in <HIV>: once inside the cell, it can remain hidden far away from the cell surface, but still infections.