Post date: Nov 27, 2012 11:50:32 AM
Polonium has a half-life of 138 days, means that the substance decays by half every 138 days. Symptoms of polonium poisoning include diarrhea, vomiting, reduction of white blood cells and hair loss, all of which were symptoms Arafat exhibited before he passed away.
SOURCE:
Al Jazeera
http://www.aljazeera.com/programmes/whatkilledarafat/2012/07/20127383653774794.html
CBS News
http://www.cbsnews.com/8301-505263_162-57554000/yasser-arafat-to-be-exhumed-poison-suspicion-to-be-pursued/