Norovirus Cases Rising Across the U.S

Diarrhea, stomach pain and vomiting typically begin 12 to 48 hours after exposure.

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(Undated) – Cases of norovirus are rising across the U.S.

The U.S. Centers for Disease Control and Prevention show there were 91 outbreaks of norovirus reported during the week of December 5.

That is up from 69 outbreaks in the final week of November.

Norovirus infection can cause severe vomiting and diarrhea that start suddenly. Noroviruses are highly contagious and are commonly spread through food or water that is contaminated during preparation or through contaminated surfaces.

Noroviruses can also spread through close contact with a person who has norovirus infection.

Diarrhea, stomach pain and vomiting typically begin 12 to 48 hours after exposure. Infection symptoms usually last one to three days, and most people recover completely without treatment.

According to the CDC, Norovirus infection occurs most frequently in closed and crowded environments. Examples include hospitals, nursing homes, child care centers, schools and cruise ships.

Seek medical attention if you develop diarrhea that doesn't go away within several days. Also call your health care provider if you experience severe vomiting, bloody stools, stomach pain or dehydration.

For more information, visit About Norovirus | Norovirus | CDC.