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During the week of Dec. 5, the CDC reported 91 cases of norovirus, more commonly known as the stomach flu, which is over double the highest number recorded between 2021 and 2024.
The winter stomach bug is back. Norovirus, a contagious virus that causes vomiting and diarrhea, has been surging in the Northeast over the past few weeks.
The symptoms of a norovirus infection make it easy for people to confuse it with the flu. "The symptoms of norovirus illness usually include nausea, vomiting, diarrhea, and some stomachcramping.
Norovirus, also known as Norwalk virus and sometimes referred to as the winter vomiting disease, is the most common cause of gastroenteritis. [1] [6] Infection is characterized by non-bloody diarrhea, vomiting, and stomach pain. [2] [3] Fever or headaches may also occur. [2]
"Norovirus symptoms usually appear 12 to 48 hours after exposure, but temporary upset stomach symptoms appear much faster — within a couple of hours," Dr. Alhassani adds.
Signs and symptoms usually begin 12–72 hours after contracting the infectious agent. [15] If due to a virus, the condition usually resolves within one week. [18] Some viral infections also involve fever, fatigue, headache and muscle pain. [18] If the stool is bloody, the cause is less likely to be viral [18] and more likely to be bacterial. [19]
The norovirus, aka the "stomach flu," is continuing to circulate, causing more cases in the U.S. Here's what to know about symptoms, transmission and treatment.
A surge in norovirus cases is hitting New York. Here is how it spreads, tips for staying safe and how this season compares to prior years.