Summary
A new variant of the norovirus, named GII.17, is causing a spike in cases across the United States as the year ends. The virus spreads easily and leads to severe vomiting and diarrhea, which can be especially dangerous for vulnerable groups such as the elderly or those with weakened immune systems. Health officials advise good hygiene practices to prevent the spread.
Key Facts
- Norovirus, known as the "winter vomiting bug," is spreading quickly due to a new variant called GII.17.
- The virus mainly causes vomiting and diarrhea and can be severe for vulnerable people like children and the elderly.
- The positivity rate for norovirus tests increased from 9.9% to 12.11% in early December.
- In December 2024, the U.S. recorded a new high in norovirus cases, with test positivity rates nearly reaching 25%.
- The GII.17 variant has become the most common strain in the U.S., surpassing the previous top variant, GII.4.
- Norovirus symptoms usually appear 12 to 48 hours after exposure and last one to three days.
- There is no specific treatment for norovirus, but staying hydrated and eating bland foods can help manage symptoms.
- Health officials recommend washing hands and disinfecting surfaces to prevent the virus from spreading.
