The impact of food safety issues on Chipotle have been much more than expected. They estimate that 7% of customers may never return. Then there are the "costs to address food safety, increased staffing needed to serve free food and the volume of fresh produce wasted due to lower traffic and testing were all higher than expected." Chipotle shares are still off 28% from last year.
Wall Street Journal
http://blogs.wsj.com/cfo/2016/03/17/chipotle-food-safety-problems-may-cost-it-up-to-7-of-customers-cfo/
Chipotle Food-Safety Problems May Cost It Up To 7% of Customers: CFO
1:13 pm ET
Mar 17, 2016
By Maxwell Murphy