Current Progress in RetrovirologyAbout This Hardback Retrovirology is the study of retroviruses. A retrovirus is a kind of RNA virus that inserts a copy of its genome into the DNA of a host cell, thus changing the genome of that cell. These viruses are either single stranded RNA or double stranded DNA viruses. The main viron components found in retroviruses are envelope, RNA and protein. Both animals and humans are affected by retroviruses. It causes tumor growth and certain cancers