Final answer:
Norovirus is caused by consuming contaminated food like leafy greens, fresh fruits, and shellfish.
Explanation:
Norovirus is caused by consuming contaminated food such as leafy greens, fresh fruits, shellfish (such as oysters), or water contaminated with the virus. Sources of norovirus contamination include raw shellfish, salads, sandwiches, and other ready-to-eat foods handled by infected individuals.
Learn more about Norovirus contamination through food consumption here:
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