Surge in Norovirus Cases Linked to New GII.17 Variant

Public health officials in the UK, US, and Europe warn of rising infections and pressure on healthcare systems as the highly contagious virus spreads.

• Norovirus, often called the 'winter vomiting bug,' is causing a sharp rise in cases, with 400 infections reported in the first seven weeks of 2025 in the UK alone.
• The new GII.17 strain, first detected in 2014, is responsible for nearly 70% of current cases and is spreading internationally due to partial immunity in populations.
• Hospitals in the UK report record-high bed occupancy from norovirus cases, with over 1,160 patients hospitalized daily, putting additional strain on the winter healthcare system.
• The virus spreads through close contact, contaminated surfaces, and food, with fewer than 100 particles needed to cause infection, and can linger in recovered individuals for up to two weeks.
• Health experts emphasize the importance of hygiene, staying home for at least 48 hours after symptoms subside, and maintaining hydration to prevent dehydration during recovery.

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