Final answer:
A food handler experiencing vomiting, diarrhea, or jaundice should seek medical attention and report their symptoms to a supervisor to prevent spreading potential foodborne illnesses.
Step-by-step explanation:
If a food handler has symptoms like vomiting, diarrhea, or jaundice, the correct course of action would be to seek medical attention and report it to their supervisor. These symptoms can be indicative of a severe foodborne illness, which may not only impact the health of the individual but also can be easily transmitted to others, especially if the individual continues to handle food. Foodborne illnesses can result from various pathogens including bacteria, viruses, and parasites and can lead to dehydration, chronic conditions, or even death if not properly treated. It is important for a food handler to stop working immediately to protect customers and seek medical guidance for their own health and safety.