Which of the following is NOT a common symptom of foodborne illness?

Excessive happiness is not a common symptom of foodborne illness, making it the correct answer. Foodborne illnesses typically present with symptoms that stem from the body's response to infection or toxins, and these symptoms often involve discomfort or distress.

Common symptoms of foodborne illness usually include nausea, fever, and headache, as these are typical physiological reactions to pathogens or chemical contaminants in contaminated food. Nausea occurs as the body attempts to rid itself of harmful substances, while fever is an indication that the immune system is fighting off an infection. Headaches can also occur as a result of dehydration or other systemic effects related to foodborne pathogens.

In contrast, excessive happiness is a psychological state that is not linked to foodborne illnesses, which are usually associated with negative physical reactions. Therefore, this option stands out as the one that does not align with the typical symptoms experienced during such illnesses.