Norovirus is on the rise. How is it different?

With a recent uptick in emergency department visits due to norovirus, understanding this highly contagious virus and how it differs from other illnesses is crucial. Norovirus, often referred to as the "stomach flu," is not related to influenza but rather a leading cause of gastroenteritis outbreaks worldwide. The Loma Linda University Health primary care team provided a guide to all things norovirus.

What is Norovirus?

Norovirus is a viral infection that causes inflammation of the stomach and intestines, leading to symptoms such as:

• Nausea
• Vomiting
• Diarrhea
• Stomach pain
• Fever and body aches

Symptoms typically develop 12 to 48 hours after exposure and can last for one to three days. While most people recover without complications, dehydration can be a concern, especially for young children, older adults, and individuals with weakened immune systems.

How is Norovirus Different from the Flu?

Many people mistakenly associate norovirus with the flu, but there are key differences:

• Cause: Norovirus is caused by a different group of viruses than influenza, which primarily affects the respiratory system.
• Symptoms: Influenza symptoms include fever, cough, sore throat, muscle aches, and fatigue, while norovirus primarily causes gastrointestinal distress.
• Transmission: Norovirus spreads through contaminated food, water, surfaces, and person-to-person contact, whereas influenza spreads through respiratory droplets.

Prevention Strategies

Preventing the spread of norovirus requires strict hygiene practices, including:

• Washing hands thoroughly with soap and water, especially after using the restroom and before eating
• Disinfecting surfaces with bleach-based cleaners
• Avoiding food preparation if experiencing symptoms
• Practicing proper food handling and cooking practices

When to Seek Medical Attention

While most cases of norovirus resolve without medical intervention, individuals should seek care if they experience:

• Severe dehydration (dry mouth, dizziness, decreased urination)
• Persistent vomiting or diarrhea lasting more than a few days
• Fever over 103°F that does not respond to medication

Loma Linda University Health emergency departments have noted an increase in norovirus cases and are encouraging the community to take preventive measures seriously. Our healthcare professionals are equipped to provide supportive care and guidance for those affected.

Consider a Video Visit:

Many symptoms can be evaluated virtually, which minimizes the risk of spreading illness to others and helps avoid wait times in a clinic. Check if your provider offers this option.

Need to see a provider in person but not sure where to go? Here is your guide to help you quickly find which service is right for your situation.