Norovirus outbreak on the Pacific Crest Trail sickens dozens of hikers near Wrightwood, with a shared water cache suspected.

The dreaded norovirus — the "vomiting bug" that often causes stomach flu symptoms — is climbing again in California, and doctors warn that a new subvariant could make even more people sick this season ...

The source of the outbreak remains unknown, but dozens of hikers have fallen ill.

A norovirus particle is pictured in this 3D illustration by Jessica A. Allen for the U.S. Centers for Disease Control and Prevention, shared via Wikimedia Commons. CDC / Jessica A. Allen, Illustrator: ...

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California health officials are warning of an uptick in cases of norovirus, also known as winter vomiting disease. The California Department of Public Health says it has confirmed 32 outbreaks of ...

First came the fires. Then, there was ash and contaminated water. Now, some survivors of the Southern California wildfires are dealing with outbreaks of norovirus and other stomach ailments at a ...

Washing your hands is important to protect yourself from norovirus, which is resistant to hand sanitizer. (Ulrich Baumgarten via Getty Images) The dreaded norovirus — the "vomiting bug" that often ...