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Which of the following symptoms is most commonly associated with foodborne illness?

  1. Nausea

  2. Fatigue

  3. Headache

  4. Sweating

The correct answer is: Nausea

Nausea is the symptom most commonly associated with foodborne illness because it often occurs as the body's natural response to toxins or pathogens ingested through contaminated food. Many foodborne illnesses trigger the digestive system to react, leading to nausea as a way to reject harmful substances. This symptom is frequently reported in a variety of foodborne pathogens, indicating its prevalence among affected individuals. In contrast, while fatigue, headache, and sweating may also occur with foodborne illnesses, they are less specific and typically result from a broader range of health issues, making nausea the most distinct and common symptom associated specifically with these types of illnesses.