- Norovirus Hits Record Highs
- New Variant Fuels Surge in Cases
- Winter Season Sees More Frequent Outbreaks
Norovirus, often referred to as the “Ferrari of viruses” due to its swift transmission, is witnessing an unparalleled surge.
According to CDC data, nearly 100 outbreaks were reported during the first week of December, the highest figure since 2010.
One in four tests for the virus returned positive results, nearly twice the rate seen during the same period last year.
This resurgence may be linked to a newly discovered mutated variant.
Global impact and possible causes of the norovirus outbreak
Some experts attribute the surge to lockdowns, which may have reduced people’s immunity to the virus.
This increase is not limited to the United States; countries such as the United Kingdom have reported a 40% rise in cases.
The CDC noted that 91 norovirus outbreaks were recorded in just one week, surpassing the previous record for this time of year by 40%.
Wisconsin leads the nation in outbreaks with 22 reports, followed by Ohio with 11, and Virginia with 6.
Norovirus affects approximately 21 million Americans annually, with 2 million seeking medical care.
The virus spreads through contact with infected vomit or feces, contaminated food, shared utensils, or surfaces that have been exposed to the virus.
While most individuals recover within a few days, norovirus is responsible for about 900 deaths each year, primarily among those aged 65 and older.
Outbreaks of norovirus are more frequent during the winter months, often due to holiday gatherings, travel, and confined spaces where pathogens spread easily.
Symptoms of norovirus include nausea, vomiting, and diarrhea, typically appearing 12 to 48 hours after exposure.
To prevent infection, doctors advise washing hands for at least 20 seconds and regularly disinfecting surfaces.
Cooking seafood to a minimum temperature of 145°F is also crucial in preventing norovirus infection.
Outbreaks across the country are monitored by the CalciNet network and the National Respiratory and Enteric Virus Surveillance System.
In January, 28% of laboratory tests detected the virus, marking a notable rise compared to previous weeks.
The Midwest, including Wisconsin and Michigan, had the highest percentage of positive tests, approaching 30%.
Epidemiologist Lisa Lindesmith cautions that these figures indicate a potentially severe year for norovirus.
Researcher Miranda de Graaf notes that a new variant of the virus, GII.17, has undergone significant mutations.
Experts are urging ongoing vigilance and adherence to preventive measures to help limit further transmission.