Human herpesvirus 8 Is present in the lymphoid system of healthy persons and can reactivate in the course of AIDS.

Dated June 22, 1995. Order of authorship in the original paper was Bigoni, Dolcetti, de Lellis....By this time Kaposi sarcoma-associated herpesvirus (KSHV) was also known as human herpesvirus-8 (HHV-8).

The authors wrote in their introduction: "Therefore, HHV-8 is fairly common in the population, and the lymphoid system could represent a reservoir of latently infected cells from which the virus may reactivate in conditions of immunodepression....In conclusion, the relatively common finding of HHV-8DNA sequences in the human population suggests a general exposure to the virus...." 

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(Thanks to Juan Weiss for this reference and its interpretation.)