How to Protect Your Holiday Gathering from a Highly Contagious Stomach Bug


A highly contagious stomach virus, often called "winter vomiting disease," is surging across Illinois and the Midwest. Health officials are urging extra caution as families prepare for holiday gatherings, warning that the actual number of cases is likely much higher than reported.
According to the CDC and wastewater data from WastewaterSCAN, norovirus concentrations in the Midwest have continued to climb even as national averages show early signs of stabilizing.

Why Norovirus is Spreading Fast

Unlike the flu or COVID-19, norovirus is incredibly "hardy" and difficult to eliminate.

  • Hand Sanitizer Is Ineffective: Standard alcohol-based sanitizers do not kill norovirus.
  • Bleach is Required: Only bleach-based cleaners are effective at disinfecting contaminated surfaces.
  • Post-Illness Shedding: You can remain contagious for two weeks or more after you feel better.
  • No Permanent Immunity: Having the virus once does not protect you from future infections, as there are many different strains.


Symptoms vs. Other Winter Illnesses

Dr. Jonathan Martin of Cook County Health notes that norovirus is distinct because it primarily targets the GI tract.

FeatureNorovirus (Stomach Flu)COVID-19 / Influenza
Primary SymptomsNausea, vomiting, diarrheaFever, cough, congestion
OnsetSudden (12–48 hours after exposure)Gradual to moderate
Duration24–48 hours5–10+ days
Respiratory IssuesRarely includes cough or congestionVery common
Warning: The biggest risk is dehydration. Seek medical care if you experience decreased urination, extreme fatigue, or dizziness when standing.

Prevention Checklist

To protect your household during the holiday season, health officials recommend these specific steps:

  • Wash with Soap: Use soap and water for at least 20 seconds. It is the only reliable way to remove the virus from your hands.
  • Disinfect Surfaces: Use bleach-based products on high-touch areas like countertops and toilets.
  • High-Heat Laundry: Wash any contaminated clothing or linens in hot water.
  • Stay Home: If you are sick, stay home for at least 48 hours after your symptoms stop to prevent spreading the virus to others.

Disclaimer: This content is published only for health awareness and informational purposes. It's not a substitute for your professional medical advice. You must consult a doctor/healthcare professional regarding your specific health concerns.

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