Amid ongoing E. coli outbreak linked to contaminated salad, we ask the experts: why IS lettuce such a food poisoning risk?

Food safety chiefs have said they are ‘confident’ a type of butterhead lettuce, named Apollo, is behind the outbreak of. Exactly how they became contaminated is yet to be established, however.Food safety chiefs have said they are ‘confident’ a type of butterhead lettuce, named Apollo, is behind the outbreak of. Exactly how they became contaminated is yet to be established, however.Read MoreHealth News | Mail Online