Norovirus sees its largest resurgence in over a decade

• Norovirus Hits Record Highs
• New Variant Fuels Surge in Cases
• Winter Season Sees More Frequent Outbreaks

The norovirus, nicknamed the «Ferrari of viruses» for its rapid spread, is experiencing an unprecedented increase.

CDC data reveal that nearly 100 outbreaks were reported in the first week of December, the highest number since 2010.

One in four tests conducted to detect the virus was positive, almost double compared to the same period last year.

The resurgence of the virus could be related to a recently identified mutated variant.

Global Impact and Possible Causes of the Norovirus Outbreak

Some experts also link this increase to lockdowns, which may have weakened people’s immunity to the virus.

The rise is not exclusive to the United States; countries like the United Kingdom report a 40% increase in cases.

The CDC reported that 91 norovirus outbreaks were recorded in one week, 40% above the previous record for this time of year.

Wisconsin leads the outbreaks in the country, with 22 reports, followed by Ohio (11) and Virginia (6).

Norovirus affects about 21 million Americans each year, leading 2 million to seek medical attention.

The virus is transmitted through contact with infected vomit or feces, contaminated food, shared utensils, or contaminated surfaces.

Although most people recover in a few days, the virus causes about 900 deaths annually, mainly in people over 65.

Norovirus outbreaks are more common in winter due to festive gatherings, travel, and enclosed spaces where pathogens spread easily.

Symptoms include nausea, vomiting, and diarrhea, which appear between 12 and 48 hours after exposure.

To prevent it, doctors recommend washing hands for at least 20 seconds and disinfecting surfaces.

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Cooking seafood to a minimum temperature of 145 degrees is also essential to prevent a norovirus infection.

The CalciNet network and the National Respiratory and Enteric Virus Surveillance System monitor outbreaks nationwide.

In January, 28% of tests performed in laboratories detected the virus, a significant increase compared to previous weeks.

The Midwest region, which includes Wisconsin and Michigan, led in percentage of positive tests, reaching nearly 30%.

Epidemiologist Lisa Lindesmith warns that the data suggest an intense year for norovirus.

A new norovirus variant, GII.17, has undergone significant mutations, according to researcher Miranda de Graaf.

Experts urge continued vigilance and adherence to prevention measures to avoid further spread.

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