An outbreak of food poisoning occurred at a high school a few hours after 100 students ate lunch at the school's cafeteria. Most of them developed symptoms including nausea, vomiting, and diarrhea. An investigation was conducted to identify the contaminated food source. Interviews were conducted with students who ate at the cafeteria, and a food history was collected. Describe this study design (case-control, cohort, cross-sectional). Explain.
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