Stomach Flu on the Rise with Rainy Weather

Monsoon season brings a spike in stomach flu, commonly caused by norovirus, due to increased indoor crowding, contaminated water, and higher humidity—ideal conditions for viral spread 0.

What is Norovirus?

Norovirus, often called the ‘stomach flu’, triggers acute gastroenteritis—symptoms include intense vomiting, diarrhea, nausea, stomach cramps, and sometimes fever or body aches. Symptoms typically begin within 12–48 hours of exposure and subside within 1–3 days 1.

Why Rains Fuel the Surge

During monsoons, people stay indoors more, increasing close contact and contamination of shared surfaces. Norovirus can survive on surfaces for weeks, and it takes as few as 10 viral particles to cause infection 2.

Transmission & Contamination Routes

The virus spreads via

• Fecal-oral contact—through contaminated hands, food, or water.
• Surface contamination—on doorknobs, utensils, and countertops.
• Contaminated food—raw shellfish and produce are major culprits in outbreak cases 3.

Preventive Measures You Can Take

• Wash hands thoroughly for 20 seconds using soap and water; sanitizers aren’t effective against norovirus 4.
• Disinfect surfaces with bleach solution (1,000–5,000 ppm) and let sit for at least 5 minutes 5.
• Cook seafood to ≥145°F and wash fruits and vegetables under running water 6.
• Heat laundry in hot cycles and dry thoroughly to kill lingering virus 7.

Treatment and Care

No specific antiviral treatment exists. Focus on supportive care: rest, hydration using water, broth, or electrolyte solutions, and gradual reintroduction of bland foods like the BRAT diet. Seek medical help if dehydration signs appear (dark urine, dizziness, reduced urination) 8.

Public Health Perspective

Norovirus leads to 19–21 million cases annually in the U.S., with 900 deaths and over 100,000 hospitalizations, mostly among young children and older adults 9. Recurrent outbreaks in confined settings during monsoon highlight the need for community vigilance and hygiene awareness.

Quick Trivia for Quiz Buffs

Fun fact: Norovirus outbreaks peak in late autumn to spring—which, in rainy climates, extends into monsoon—due to indoor gatherings and environmental stability. Norovirus accounts for 58% of foodborne illnesses, often via shellfish and fresh produce 10.

Source: News 18