http://www.cnn.com/2007/WORLD/asiapcf/04/02/easter.kiwi.reut/index.html the part that really interested me was
A virus that causes the rabbits to bleed to death was introduced illegally in 1997, significantly cutting numbers, but Oldfield said some rabbits were building immunity.
So basically, someone introduced bunny Ebola. The fact that I find this funny probably means I'm going to the hot place.