The chimpanzee Lymphocryptovirus (LCV) is a herpesvirus which infects chimpanzee leukocytes. It is also known by the names: Pongine herpesvirus 1, PoHV-1, Herpesvirus pan, and Panine herpesvirus 1. It is 35 to 45% homologous

Homology (biology)

Homology forms the basis of organization for comparative biology. In 1843, Richard Owen defined homology as "the same organ in different animals under every variety of form and function". Organs as different as a bat's wing, a seal's flipper, a cat's paw and a human hand have a common underlying...

 to the human Epstein-Barr virus

Epstein-Barr virus

The Epstein–Barr virus , also called human herpesvirus 4 , is a virus of the herpes family and is one of the most common viruses in humans. It is best known as the cause of infectious mononucleosis...

. The glycoprotein B (gB) gene of the chimpanzee Lymphocryptovirus is virtually identical to the corresponding gene in the orangutan lymphocryptovirus

Orangutan lymphocryptovirus

The orangutan lymphocryptovirus was the first herpesvirus isolated from an orangutan. It is also known by the names: Pongine herpesvirus 2, PoHV-2, and Orangutan herpesvirus....

. This suggests that the virus may have been transmitted between chimps and orangutans relatively recently (either in the wild or in captivity).