"King Tut Curse" Caused by Tomb Toxins?

http://news.nationalgeographic.com/news/2005/05/0506_050506_mummycurse.html
Quite a fun article, looking to address the curse of the tomb of Tutankhamun: "In recent years a scientific mummy's-curse theory was offered for Carnarvon's death. Was he killed by exposure to ancient, toxic pathogens from the sealed tomb? Did they prove too much for his immune system, which was weakened by a chronic illness he had experienced before he went to Egypt?" See the article for more.