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Any of a group ofvirusesthat belong to the family Retroviridae and that characteristically carry their genetic blueprint in the form of ribonucleic acid are called retroviruses.
Retroviruses are named for an enzyme known asreverse transcriptase, which was discovered independently in 1971 by American virologistsHoward TeminandDavid Baltimore.Reverse transcriptase transcribesRNAinto deoxyribonucleic acid.