A food poisoning expert told Business Insider the chain isn't necessarily doing anything wrong. According to food safety advocate and attorney Bill Marler, the reason food poisoning scandals continue to haunt Chipotle is more rooted in psychology than food safety.
"I think that a lot of it just has to do with the fact that people are very acutely aware of what happened at Chipotle in 2015," Marler told Business Insider. "To have a norovirus outbreak, E. coli outbreak, salmonella outbreak within months of each other is unprecedented. So, I think that, along with media and social media, heightened people's attention."