For the last month, Americans have viewed their lunchtime salads or even a single, crisp leaf of iceberg on their burger as a possible threat. Could it harbor cyclospora, the explosive-diarrhea-causing parasite that by early August had sickened thousands, hospitalized hundreds, and led to two deaths? In Michigan, the epicenter of the cyclospora outbreak, cases are on the downturn, yet our national fear persists. It didn’t help that the Centers for Disease Control and Prevention recently widened the scope of the outbreak to 15 states (a move that is more about retrospective detective work than some new surge in infections). Nor is it comforting that the root cause of the outbreak — that is, how the suspected tainted lettuce was contaminated — is still a mystery. Adding to the chaos is a separate recall of products containing potentially salmonella-tainted jalapeños distributed by Taylor Farms, the same company implicated in the cyclospora outbreak. Americans are rightly overwhelmed and confused. When can they feel safe throwing a bag of lettuce in their grocery carts again? Probab