Interesting, the wikipedia page for Kary Mulis says he died of pneumonia. Also, while the article talks about all his accomplishments, it is littered with swipes about his halucegenetic drug use and this silly remark ...
“He used profanities to make a point and often said, “Oh, Lord,” in response to the absurdities experienced in life.”
Also a comment about having seen an extraterrestrial raccoon.