A process of unidirectional viral DNA replication that takes place on a circular DNA to rapidly produce numerous copies of the viral genome. Involves creating a nick in one strand of the circular DNA molecule at the origin of replication. DNA is then synthesized by DNA polymerase. Using the non-nicked strand as a template, replication proceeds around the circular DNA molecule, displacing the nicked strand as single-stranded DNA.
rolling circle viral DNA replication