This post from the BBC has little or nothing to do with survival, at least for most of us..I just had to post it.
I have never in all my life heard of this happening. A parasite that kills you, then restarts your heart. - result = Zombies - I kid you not.
http://65.127.124.62/south_asia/4483241.stm.htm Edit -It was last updated April 1st...hmmm..maybe not quite so scary.