Encephalitis can be caused by a number of organisms, including the herpes virus and while the condition itself isn't contagious, the causative organism may be. The word "infectious" is misleading.
SOME THING THAT CAN BE PASSED ON SUCH AS AN ILLNESS, LIKE THE FLU.In terms of human geo. it is the distance-controlled spreading of an idea, innovation, or some other item through a local population...