Norovirus outbreaks surge across the U.S. as winter approaches
Norovirus cases are climbing in the United States, raising concerns about another winter storm of infections. Early data from the CDC shows a steady increase, with nearly 14% of lab tests returning positive in mid-November. Health officials warn that the virus spreads quickly in colder winter weather and can cause severe outbreaks.
Between August 2024 and July 2025, the CDC recorded at least 2,675 norovirus outbreaks—almost double the previous year’s total. The virus causes around 20 million cases of vomiting and diarrhoea annually in the U.S., leading to roughly 100,000 hospitalisations. Wyoming, Nebraska, and Oklahoma are currently the hardest-hit states.
Norovirus remains a serious public health concern, particularly as winter approaches. The CDC’s latest figures suggest another possible surge in infections. Preventative measures, such as hygiene and proper food handling, are key to reducing transmission.
