US health authorities on Friday declared the ⁠nation’s largest recorded cyclosporiasis outbreak ⁠over, after contaminated iceberg lettuce sickened thousands, though ⁠the Food and Drug Administration (FDA) said it was still investigating how the parasite entered the food supply. The outbreak, which federal investigators linked to lettuce from central Mexico sourced by Taylor Farms, prompted one of the largest food recalls in recent years and renewed scrutiny of food-safety controls for imported...