Eight types of herpesviruses infect humans ( see Table: Herpesviruses That Infect Humans Herpesviruses That Infect Humans 
). After initial infection, all herpesviruses remain latent within specific host cells and may subsequently reactivate. Clinical syndromes due to primary infection can vary significantly from those caused by reactivation of these viruses. Herpesviruses do not survive long outside a host; thus, transmission usually requires intimate contact. In people with latent infection, the virus can reactivate without causing symptoms; in such cases, asymptomatic shedding occurs and people can transmit infection.
Despite the fact that the herpesviruses are genetically and structurally similar, they cause a wide array of generally non-overlapping clinical syndromes.
In contrast to other herpesviruses which are not known to cause malignancy, Epstein-Barr virus (EBV) and human herpesvirus type 8 (HHV-8), also known as Kaposi sarcoma–associated herpesvirus (KSHV), can cause certain cancers.
Roseola infantum Roseola Infantum Roseola infantum is an infection of infants or very young children caused by human herpesvirus 6B (HHV-6B) or, less commonly, HHV-7. The infection causes high fever and a rubelliform eruption... read more 
is a childhood disease caused by herpesvirus 6 (and sometimes 7).
Drug Treatment of Herpesviruses
Drugs that have activity against herpesviruses include acyclovir, cidofovir, famciclovir, fomivirsen, foscarnet, ganciclovir, idoxuridine, penciclovir, trifluridine, valacyclovir, valganciclovir, and vidarabine ( see Table: Drugs Used to Treat Herpesvirus Infections Drugs Used to Treat Herpesvirus Infections ).
