Chipotle's latest move is announcing it's changing its supply chain to "reduce the risk of contamination to a level near zero."
On a smaller scale, Jim Thornton knows something about what Chipotle's leadership is going through. Thornton served as president & CEO of Botanical Laboratories and in 2012, the natural supplements company began a voluntary recall of its products after reports of some salmonella or E. coli contamination.
"You have to have a very solid recall plan. You look at all the microbial testing and look at where all the ingredients come from," Thornton told CNBC.
"It's a very tedious process. It's painstaking."