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How long is a norovirus infection contagious?

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While you can shed the virus for up to 8 weeks, it is less and less infectious over time. In most cases, you can return to work or school after you have been symptom-free for 48 hours. Food service workers are generally encouraged to wait 72 hours before they handle food.

If your child don't feel entirely better after 48 hours, keep him or her home for another day or two. Whenever you’re sick, your resistance is down and you have an increased chance that you’ll pick up something else.

From: Norovirus: Symptoms and Treatment WebMD Medical Reference

SOURCES:

Edward Gaydos, DO, pediatrician, Cleveland Clinic.

CDC: "Norovirus: Clinical Overview."

CDC website.

San Francisco Department of Public Health: "Norovirus."

Reviewed by Dan Brennan on January 28, 2019

SOURCES:

Edward Gaydos, DO, pediatrician, Cleveland Clinic.

CDC: "Norovirus: Clinical Overview."

CDC website.

San Francisco Department of Public Health: "Norovirus."

Reviewed by Dan Brennan on January 28, 2019

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When should I call or visit the doctor for a norovirus infection?

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