A type of virus that uses RNA as its genetic material. After infecting a cell, a retrovirus uses an enzyme called reverse transcriptase to convert its RNA into DNA. The retrovirus then integrates its viral DNA into the DNA of the host cell, which allows the retrovirus to replicate.
Hear the fascinating story of how retroviruses were found and proven against the vast majority of scientific opinions that deemed the idea to have been nonsense for many years! This is like science-fiction of the nasty kind, found in this Revisionist History podcast episode below!