Ganciclovir
Ganciclovir has also been used with some success in treating "Human herpesvirus 6" infections.
Human herpesvirus 6
Other betaherpesviruses establish latency as a nuclear episome, which is a circular DNA molecule (analogous to plasmids). For HHV-6, latency is believed to occur exclusively through the integration of viral telomeric repeats into human subtelomeric regions. Only one other virus is known to achieve latency in this fashion. This phenomenon is possible as a result of the telomeric repeats found within the direct repeat termini of HHV-6’s genome.