Which of the following is NOT a sign of foodborne illness?

The choice of "Improved Appetite" as the answer is based on the fact that an increase in appetite is not typically associated with foodborne illnesses. When individuals experience foodborne illnesses, they commonly exhibit symptoms such as nausea, fever, and headaches, which can result from viral, bacterial, or parasitic infections affecting the gastrointestinal system. These symptoms often lead to a decreased desire to eat or a loss of appetite as the body focuses on fighting off the infection.

In contrast, an improved appetite suggests a state of wellness and recovery, as the body is signaling that it is ready to take in food for energy and nutrients. Therefore, recognizing "Improved Appetite" as the option that does not belong in the list of foodborne illness signs reflects an understanding of how foodborne illnesses typically manifest in affected individuals.