But exactly how potentially deadly E.coli bacteria contaminated romaine lettuce twice in the last few months remains a mystery. But back in December, two Canadians died after eating romaine lettuce and 42 others got sick. "I still believe back in December they should have had a recall of the romaine lettuce," he said. Officials have declared the current outbreak over now that romaine lettuce is no longer coming from the Yuma region. In the case of romaine lettuce, that means removing the outer leaves and rinsing the rest.

Source: CBC News May 19, 2018 12:56 UTC