In July, there was a recall on two brands of plant-based milks, Silk and Great Value, after a listeria outbreak that led to at least 20 illnesses and three deaths (https://www.theglobeandmail.com/canada/article-cfia-food-safety-algorithm-listeria-outbreak/) . Public health officials determined the same strain of listeria had been making people sick for almost a year. When Globe reporters began looking into what happened, they found a surprising fact: the facility that the bacteria was traced to had not been inspected for listeria in years. The reporters learned that in 2019 the Canadian Food Inspection Agency introduced a new system that relies on an algorithm (https://www.theglobeandmail.com/canada/article-behind-the-story-investigating-lapses-in-canadas-food-safety-system/#:~:text=At%20the%20outset%20of%20The,to%20a%20production%20facility%20in) to prioritize sites for inspectors to visit. Investigative reporters Grant Robertson (https://www.theglobeandmail.com/authors/grant-robertson/) and Kathryn Blaze Baum (https://www.theglobeandmail.com/authors/kathryn-blaze-baum/) talk about why this new system of tracking was created, and what went wrong.