McFarland Clinic

Norovirus Spreads Misery

Text Size
Smaller Larger

February 22, 2017

Norovirus is causing widespread misery for many families this winter. Commonly known as the stomach flu, symptoms include nausea, vomiting, diarrhea, stomach pain/cramping, low fever, fatigue and muscle aches. 

Norovirus is highly contagious and can spread quickly in closed spaces. While no vaccine or medication is available to prevent or treat norovirus, an understanding of the illness can help prevent the spread to more people. 

Laura Hufford, MD, McFarland Clinic Pediatric Hospitalist, shares what makes norovirus so contagious and how you can limit the spread of germs. 

What makes norovirus so contagious?

Several factors make norovirus especially contagious: 

  1. The virus is excreted prior to the onset of symptoms and for as much as three weeks after symptoms resolve.
  2. It only takes a small amount of the virus (low dose exposure) to cause illness. 
  3. Large amounts of the virus are excreted in stool and vomit. 

How is it spread?

Transmission occurs from person-to-person spread through the fecal-oral or vomitus-oral route, through contaminated food or water or by touching surfaces contaminated with the virus and then touching your mouth or nose.

How long is a person contagious?

A person is most contagious when they have vomiting and diarrhea but can shed the virus and spread the virus to others for 3 weeks.

What are some of the complications of norovirus?

The main complication of norovirus is dehydration. Dehydration can become severe and require hospitalization. Indeed roughly 70,000 people are hospitalized each year with norovirus infection in the United States and 800 deaths are attributed to the illness.

How can people prevent norovirus?

Hand hygiene is the most important way to prevent norovirus. Soap and water have been found to be more effective than alcohol gels in preventing transmission. Additionally, surfaces should be properly sanitized. The Center for Disease Control recommends using a chlorine bleach solution to disinfect surfaces. 

Child care providers and food handlers who are ill should stay home from work until they are symptom free. Children who are ill should not attend daycare or school until their symptoms have subsided.

What is the proper way to wash your hands?

The Centers For Disease Control provides these steps for effective hand washing:

  1. Wet your hands with clean, running water (warm or cold), turn off the tap, and apply soap.
  2. Lather your hands by rubbing them together with the soap. Be sure to lather the backs of your hands, between your fingers, and under your nails.
  3. Scrub your hands for at least 20 seconds. 
  4. Rinse your hands well under clean, running water.
  5. Dry your hands using a clean towel.

Need to schedule an appointment? McFarland Clinic offers online scheduling at with your primary care provider, McFarland Express Care, or McFarland Urgent Care.

« Back

© 2019 McFarland Clinic. All rights reserved.