Public health data from late 2025 indicates that cases are surging earlier and more intensely than usual this season. Here is a summary of the current situation based on recent news and CDC reports:
1. What is “Winter Vomiting Disease”?
- Identity: It is a common nickname for Norovirus (or the “stomach flu,” though it is unrelated to influenza).
- Seasonality: It is commonly referred to as “winter vomiting disease” because outbreaks typically peak between November and April, when people spend more time indoors.
2. Why is it in the News Now (December 2025)?
- Early Surge: Cases have been rising since mid-October, which is ahead of the typical schedule.
- Wastewater Data: Sewage surveillance has detected high levels of the virus in several regions, particularly in the Midwest, South, and Northeast (including states like Louisiana, Michigan, and Indiana).
- New Strain: Experts are monitoring a newer strain of the virus, GII.17, which appears to be driving many of the current outbreaks. This strain may be more contagious or better able to evade immunity from previous infections than older strains.
3. Key Symptoms
Symptoms usually appear suddenly (12–48 hours after exposure) and last 1–3 days:
- Primary: Sudden, forceful vomiting and watery diarrhoea.
- Secondary: Stomach cramps, nausea, and occasionally a low-grade fever or headache.
- Risk: The primary concern is dehydration, particularly in young children and older adults.
4. Prevention & Protection
- Hand Sanitiser Does Not Work: Alcohol-based sanitisers generally do not kill norovirus. You must wash your hands thoroughly with soap and water for at least 20 seconds.
- Surface Cleaning: The virus is extremely hardy and can linger on surfaces for days. Bleach-based cleaners are recommended for disinfecting contaminated areas.
- Isolation: You are most contagious when sick and for a few days after recovering. Stay home for at least 48 hours after symptoms stop.
