The Centers for Disease Control and Prevention (CDC) reports a significant surge in norovirus cases across the United States. Norovirus, a highly contagious virus, causes symptoms such as diarrhea, vomiting, nausea, and intense stomach pain. While symptoms typically last between 12 and 47 hours and often resolve without medical intervention, the virus is the leading cause of foodborne illness in the country.
According to the CDC, the number of reported outbreaks increased from 69 during the last week of November to 91 in the week of December 5. Norovirus outbreaks are most common between November and April, with an estimated 2,500 occurring annually. However, actual cases are likely underreported because hospitals rarely test for norovirus, and many people recover at home.
The virus spreads through tiny particles of feces or vomit, often transmitted via contaminated food, water, surfaces, or direct contact with infected individuals. It takes only a few viral particles to cause illness, making norovirus highly transmissible. Crowded environments such as cruise ships, dormitories, prisons, and daycare centers are especially vulnerable to outbreaks. Children under five and older adults are at the highest risk of severe infections.
Health experts recommend hand-washing with soap and water as the most effective way to prevent the spread of norovirus. Alcohol-based hand sanitizers are less effective against the virus. Disinfecting contaminated surfaces and avoiding potentially unsafe food or water are also critical in preventing transmission.
This rise in norovirus outbreaks coincides with other public health challenges. California Governor Gavin Newsom recently declared a state of emergency in response to a bird flu outbreak, highlighting the ongoing concerns this winter. Health officials urge vigilance as norovirus and other illnesses continue to circulate widely.
