This lifeform is found widely in Africa. This lifeform is found widely in Eurasia. This lifeform is found widely in the Indo-Australian region. This lifeform is widespread in North America. This lifeform is found widely in the New World tropics.

Herepesviridae (HSV-1 and HSV-2) are called Herpes simplex.  This lifeform can survive in a human host for the hosts lifetime, and can break out at any time.

Viruses are the most primitive of lifeforms.