Noroviruses are classified into 10 groups known as GI-GX, but most norovirus outbreaks are caused by viruses in genogroups GI and GII, wrote Leslie Barclay, microbiologist at the CDC, Atlanta, and ...

Norovirus GII.17 has rapidly overtaken GII.4 as the leading cause of norovirus outbreaks in the United States between 2022 and 2025. ... GI and GII genogroup viruses are responsible for the most ...

Most noroviruses that infect humans belong to two groups, known as GI and GII. Based on unpublished work by his team, the GI.1 vaccine would probably protect against other closely related GI ...

But with GII.17 now identified in more than 3 in 4 outbreaks in the U.S., its displacement of the GII.4 strain that had previously been dominant is raising questions about whether norovirus season ...

The two dominant strains of norovirus in the UK are GII.17 and GII.4. Hospitals are warning anyone who has norovirus symptoms to stay at home.

GI and GII genogroup viruses are responsible for the most outbreaks. Between 2011 and 2024, GII.4 viruses accounted for over half of outbreaks in the US in each season (September to August).

The two dominant strains of norovirus in the UK are GII.17 and GII.4. Hospitals are warning anyone who has norovirus symptoms to stay at home.

The two dominant strains of norovirus in the UK are GII.17 and GII.4. Hospitals are warning anyone who has norovirus symptoms to stay at home.

The two dominant strains of norovirus in the UK are GII.17 and GII.4. Hospitals are warning anyone who has norovirus symptoms to stay at home.

The two dominant strains of norovirus in the UK are GII.17 and GII.4. Hospitals are warning anyone who has norovirus symptoms to stay at home.

The two dominant strains of norovirus in the UK are GII.17 and GII.4. Hospitals are warning anyone who has norovirus symptoms to stay at home.

The two dominant strains of norovirus in the UK are GII.17 and GII.4. Hospitals are warning anyone who has norovirus symptoms to stay at home.