Norovirus GII.17 Overtakes GII.4 as the Dominant Strain in US Outbreaks

Norovirus GII.17 overtakes GII.4 as the dominant strain in US outbreaks

Norovirus GII.17 has rapidly overtaken GII.4 as the leading cause of norovirus outbreaks in the United States between 2022 and 2025. This unprecedented shift signals an urgent need for continued genomic surveillance and preparedness for future outbreak trends.

Will norovirus surge early again this year?

Last season got off to a particularly rocky start, with 91 suspected or confirmed outbreaks during the first week of December

‘Quad-demic’: How to stay safe from flu, norovirus, COVID, RSV

The flu, norovirus, COVID and RSV are all at elevated levels — and officials at the CDC expect it to stay that way for weeks. NBC medical contributor Dr. Natalie Azar joins TODAY with tips for keeping you and your family healthy and what to know about vaccines.

Will norovirus surge early again this year? CDC urges tracking of new strain.

The norovirus strain GII.17 may have disrupted the seasonal pattern of outbreaks.

Will norovirus surge early again this year? CDC urges tracking of new strain. - Daily news Update

After years of largely predictable norovirus waves, the emergence of a new strain might have disrupted the seasonal pattern of outbreaks from this notorious stomach bug, suggests a new report by the Centers for Disease Control and Prevention. In previous years, the U.S. usually saw norovirus outbreaks increase around December. That marked the start of the season for the virus. But last year’s season started in October, as a new norovirus strain …