However, the strain only rose to dominance in norovirus outbreaks over a year ago; between Sept. 1, 2023 through Aug. 31, ...

All previous waves of norovirus in the U.S. since 2012 have been dominated by a different strain that scientists call GII.4, said Vinjé. This season, only around 7% of norovirus outbreaks have ...

That marked the start of the season for the virus. But last year's season started in October, as a new norovirus strain called GII.17 drove a record wave of outbreaks.

A new strain of norovirus may be circulating, potentially leaving fewer people with immunity, according to Lynn Roberts, an epidemiologist with the Wisconsin Department of Health Services.

How you can catch norovirus twice. From September 1, 2024 through the end of December, health officials reported 56 norovirus outbreaks across the country, spanning 10 different genotypes, or strains.

A surge in norovirus cases might be explained by a new strain of the virus, which now reportedly makes up a majority of outbreaks across the U.S.. This winter’s dominant norovirus strain is a ...

The other reason norovirus is surging this year is because new strains have been introduced. “Surges with up to 50 percent more illness occur in seasons during which a new strain emerges,” Hopkins ...

NEW YORK — A new strain of norovirus now makes up a majority of outbreaks nationwide, according to data from the Centers for Disease Control and Prevention. The new strain's emergence, found ...

Norovirus cases have surged, joining other viruses like flu, RSV, and Covid. Experts cite a new strain, GII.17[P17], responsible for 70% of outbreaks from September to December 2024. Symptoms ...

A new norovirus strain reported in Alabama and Tennessee will likely come to Columbus, and residents have less immunity to it. Photo by Pixabay The highly contagious norovirus has been rapidly ...

Norovirus outbreaks on cruise ships are spiking in 2025, ... “However, CDC data show a newly dominant strain is currently associated with reported norovirus outbreaks on land.