Report by
USA Today - Mythbusting
Feb 11, 2014
Most interesting point to me here - I didn't know about the 2002/2003 study: "A 2002-2003 study found that nearly two-thirds of restaurant-based outbreaks were caused by sick workers. About one-third were caused by employees touching food with their bare hands." https://www.usatoday.com/story/news/nation/2014/02/01/food-poisoning-myths/4475101/