New Norovirus Strain Drives Surge in U.S. Outbreaks

A record number of norovirus cases this winter is linked to the GII.17 strain, with experts highlighting prevention and treatment strategies.

The GII.17 strain of norovirus, which may evade existing immunity, is responsible for an unusually high number of outbreaks across the U.S. this season.
Norovirus causes acute gastroenteritis, with symptoms like vomiting, diarrhea, and dehydration, and leads to 900 deaths and over 100,000 hospitalizations annually in the U.S.
The virus spreads through contaminated food, surfaces, or direct contact, with raw shellfish and improper food handling identified as common sources of infection.
Health officials emphasize prevention methods such as thorough hand-washing with soap and water, disinfecting surfaces with bleach solutions, and avoiding food preparation while sick.
While most cases resolve within a few days, severe dehydration or symptoms like blood in stool may require medical attention; vaccines for norovirus are still in development.