In 1989, millions of cases of imported fruit were banned after a small amount of cyanide was found in just two grapes. There's 33 times more cyanide in a single cigarette than was found in both of those grapes.
"Economic Policy: Interest Rates Are Kept High." Truth Tobacco Industry Documents. 16 Feb. 1989. Report.https://industrydocuments.library.ucsf.edu/tobacco/docs/#id=mgng0210
Kazman, Sam."When Chemophobia Ruled the Land." Truth Tobacco Industry Documents. June 1993. News Article.https://industrydocuments.library.ucsf.edu/tobacco/docs/#id=qtxk0114
"April Risk Assessment: Low Through Out the Country." Truth Tobacco Industry Documents. 17 Mar. 1989. Note.https://industrydocuments.library.ucsf.edu/tobacco/docs/#id=kgng0210
Mejia, John. "A Year After Grape Scare, Chilean Fruit Sales Thrive." Truth Tobacco Industry Documents. 05 Mar. 1990. Article.https://industrydocuments.library.ucsf.edu/tobacco/docs/#id=nrjv0199
Hoffman, Diertrich, Ilse Hoffman, and Karen El-Bayoumy. "The Less Harmful Cigarette: A Controversial Issue. A Tribute to Ernst L. Wynder." Chemical Research in Toxicology. The American Chemical Society, 28 June 2001. 14 (7): 767–90. Web.http://pubs.acs.org/doi/abs/10.1021/tx000260u