Norovirus cases are on the rise across the United States, with rates typically increasing from late fall through winter, according to data from the Centers for Disease Control and Prevention. Infectious disease experts attribute this seasonal increase to people spending more time indoors, which facilitates the virus's spread.
Norovirus commonly causes outbreaks in settings like cruise ships and nursing homes, but sporadic cases also become more frequent during the winter months. The virus is known for its contagiousness and can survive longer on surfaces in cooler temperatures, making it particularly prevalent in winter. One expert noted that a new strain of norovirus has been circulating this year, potentially contributing to an even more significant increase in cases this winter.
The primary symptoms of norovirus include nausea and vomiting, often accompanied by fever and diarrhea. Most individuals recover within one to three days with home care, but severe cases can lead to complications requiring medical attention. Dehydration is a common concern, and individuals experiencing lightheadedness due to fluid loss should seek medical advice. Symptoms such as persistent fevers or blood in the stool may indicate a more invasive infection and warrant consultation with a healthcare provider.
Preventing the spread of norovirus relies heavily on stringent hygiene practices, particularly thorough handwashing with soap and water. Experts emphasize that alcohol-based hand sanitizers are not effective against norovirus. Proper handwashing, lasting approximately 20 seconds or the duration of singing "Twinkle, Twinkle Little Star," should be practiced before eating, after using the restroom, after changing diapers, and when caring for sick individuals. Given the virus's ability to persist on surfaces for up to two weeks, frequent handwashing is recommended, especially in communities experiencing outbreaks.
Individuals who become sick with norovirus are advised to stay home while symptomatic to prevent further transmission. It is also recommended to avoid preparing food for others for two to three days after symptoms have subsided. Monitoring for severe symptoms like dehydration, fever, or blood in the stool is crucial, and prompt medical attention should be sought if these arise.