Don’t Ignore Diarrhea and Vomiting—Beware of Norovirus!

Autumn and winter are peak seasons for Norovirus activity. During these periods, sudden temperature drops in late autumn and the fluctuating temperatures of early spring create conditions favorable not only for influenza but also for the spread of norovirus. Norovirus is one of the main causes of viral gastroenteritis. After infection, individuals may experience sudden diarrhea, vomiting, nausea, abdominal pain, and even fever. In severe cases, dehydration may occur, which can be particularly serious for young children, older adults, and individuals with weakened immune systems.

Norovirus Mainly Spreads Through the “Fecal–Oral Route”

Norovirus is extremely contagious, and only a very small number of viral particles are needed to cause infection. It is primarily transmitted through the fecal–oral route, such as by consuming contaminated food or water, or by touching objects contaminated with vomit or feces from an infected person. Commonly touched surfaces—such as door handles, elevator buttons, and other public facilities—may also become sources of infection.

Therefore, norovirus is not only spread through contaminated food but can also rapidly spread in crowded environments such as schools, nursing homes, and hospitals. Without proper precautions, outbreaks can easily occur.

Maintain Personal and Environmental Hygiene—Seek Medical Care If Symptoms Occur

The most effective way to prevent norovirus infection is to maintain good personal hygiene and environmental cleanliness. The public is encouraged to develop the following habits:

Wash Hands Frequently:

Wash hands with soap and running water for at least 20 seconds, especially before eating, after using the restroom, and before handling food.

Avoid Sharing Utensils:

Even among family members, it is best to use personal utensils to reduce the risk of cross-contamination.

Cook Food Thoroughly:

Foods that are easily contaminated, such as seafood and vegetables, should be thoroughly cooked before consumption.

Disinfect the Environment:

Vomit and feces from infected individuals should be cleaned promptly. Use chlorine bleach solution (approximately 1,000 ppm) to disinfect contaminated areas and effectively eliminate the virus.

Appropriate Isolation for Patients:

Individuals infected with norovirus should stay home and rest, avoiding work or school. They should wait at least 48 hours after symptoms disappear before returning to food-handling work.

In most cases, symptoms of norovirus infection gradually improve within 1–3 days. However, if severe dehydration occurs—such as dry mouth, reduced urination, sunken eyes—or if a high fever persists, medical attention should be sought promptly.

Currently, there is no specific antiviral medication for norovirus. Treatment mainly focuses on replenishing fluids and electrolytes to prevent dehydration caused by vomiting and diarrhea.

Although norovirus spreads rapidly, the risk of infection can be significantly reduced by maintaining proper hygiene and safe food practices. The government continues to promote food safety and disease prevention measures and calls on the public to work together in adopting preventive practices in daily life. By doing so, we can protect our own health and that of our families.

Let us work together to prevent norovirus and safeguard the health of ourselves and our loved ones.

Source: Taiwan Food and Drug Administration (TFDA)

https://www.fda.gov.tw/TC/PublishOtherEpaperContent.aspx?id=1562&tid=5166&r=1833063273