Remember... This is an Alpha. Its not a Beta and its not a released game. If you sign up to receive brand new and untested treatments for cancer... You are receiving bleeding edge and untested treatments for cancer.
Its shock. Here's a good wiki page to skim around on for info. http://dayzwiki.com For all the affects and how to treat them: http://dayzwiki.com/wiki/index.php?title=Survival
Man, wish I had read these forums first. Lost my rifle, bow, and hatchet before I realized what they were totally gone. I was inside a building when all this happened. I did not see them on the floor anywhere. Time to get sneaky...