The EEHVs are members of the Proboscivirus genus, a novel clade most closely related to the mammalian betaherpesviruses that have been responsible for as many as 70 deaths of both zoo and wild Asian elephants worldwide, especially in young calves [REF].
EEHV1A (originally just known as EEHV1) was the first species/type identified, which causes an acute hemorrhagic disease with a very high mortality rate in Asian elephants [REF].