They are divided into 6 major genogroups designated GI through GVI. GI and GII contain the majority of norovirus strains associated with human diseases and are further divided into about 30 genotypes.

A norovirus outbreak aboard a luxury cruise ship has left over 224 passengers and 17 crew members sickened, according to the CDC.

Ocean vacations remain the safest and most fun family adventures, says a hospitality expert. But with outbreaks of the ...

In unpublished work, the researchers found that a version of the vaccine containing both GI.1 and GII.4 norovirus variants – the latter of which is currently surging in the UK - generated ...

Meanwhile, the GII.4 strain has sharply risen, now representing 29% of cases compared to just 10% three months ago. This means that people who have already had norovirus this season may catch it ...

Although experts don't know the cause of this latest surge, a newer form of norovirus might be to blame. The GII.17 strain may be responsible and people may have little immunity to it. Nearly ...

“In all three South Florida wastewater treatment facilities in which Verily monitors pathogens, we’ve seen persistently high levels of Norovirus GII since November/December 2024,” said Amy ...

Russo, of the University at Buffalo's Jacobs School of Medicine of Biomedical Sciences, warned that a new norovirus variant has become dominant this year—GII.17. "It is hypothesized that some ...

In a new study, wastewater surveillance for multiple pathogens at five different sites identified local trends that were not captured in larger surveillance programs, and some sites used the data to ...

Through just the first four months of 2025, there have been at least a dozen viral outbreaks on cruise ships, the vast majority of which were found to be Norovirus. The latest outbreak of Pukes ...

So far this year, there have been 10. The outbreaks have persisted in part because of a new norovirus strain, GII.17. Most of the population has no exposure to the bug, meaning transmission from ...