A genus of the family HERPESVIRIDAE, subfamily BETAHERPESVIRINAE, whose viruses have been isolated from lymphocytes. HERPESVIRUS 6, HUMAN is the type species.

A species in the genus ROSEOLOVIRUS, of the family HERPESVIRIDAE. It was isolated from activated, CD4-positive T-lymphocytes taken from the blood of a healthy human.

Infection with ROSEOLOVIRUS, the most common in humans being EXANTHEMA SUBITUM, a benign disease of infants and young children.