How long can the norovirus virus be shed in stool after symptoms appear?

The correct duration for how long norovirus can be shed in stool after symptoms appear is approximately three weeks. Norovirus is known for causing gastroenteritis, and while symptoms such as vomiting and diarrhea typically resolve within 1 to 3 days, the virus can linger in the gastrointestinal tract and be shed in feces for a longer period. Research indicates that shedding can occur for at least 2 to 3 weeks after the individual has recovered from acute symptoms, and in some cases, it can even last longer.

This prolonged shedding is significant because it increases the risk of transmission, as the virus can contaminate surfaces and food if proper hygiene is not practiced. Understanding this time frame is crucial for food safety managers and food handlers to ensure effective measures are taken to prevent outbreaks, especially in environments like restaurants and catering services where food is being prepared for large groups of people.