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Norovirus cases skyrocket across US, here's how to avoid the stomach bug

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Norovirus cases skyrocket across US, here's how to avoid the stomach bug

Cases of norovirus, also known as food poisoning or the stomach bug, have picked up steam across the U.S.

The number of suspected or confirmed outbreaks skyrocketed at the end of 2024, with more than 91 norovirus outbreaks reported by state health departments by the first week of December, according to data from the Centers for Disease Control and Prevention (CDC).

Norovirus typically shows up with an onset of uncomfortable symptoms, including nausea, vomiting, diarrhea and stomach pain. In some cases, it can cause fever, headache and body aches.

CASES OF NOROVIRUS OR STOMACH FLU CLIMB STEADILY ACROSS US: ‘THIS IS THE SEASON FOR IT’

Chad D. Neilsen, MPH, director of Infection Prevention and Control at Nemours Children’s Health in Florida, shared with Fox News Digital that norovirus is the leading cause of foodborne illnesses in the U.S., causing about 20 million cases each year.

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A graph showing the number of suspected or confirmed norovirus outbreaks reported by NoroSTAT-participating states per week between August 2012 and December 2024. (CDC)

Norovirus is responsible for about 109,000 hospitalizations and 900 deaths each year in the U.S., mostly affecting adults over 65 years old, according to the National Foundation for Infectious Diseases (NFID).

About one in 15 Americans will get norovirus annually, and one out of 160 children will be hospitalized.

Spread and symptoms

People of any age can be infected and can show symptoms within two days, Neilsen noted.

“Norovirus is extremely contagious, and is usually transmitted between people via close contact, but often via surfaces, utensils or foods that are contaminated with the virus,” the doctor warned. 

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“There is no treatment except to stay well-hydrated.”

Fox News senior medical contributor Dr. Marc Siegel also weighed in, telling Fox News Digital that norovirus spreads “easily through food and food handling.”

Norovirus symptoms include nausea, vomiting, diarrhea and stomach pain. (iStock)

“It is wildly contagious and hard to defend against except by frequent handwashing, identifying symptoms early (vomiting, diarrhea, low-grade fever), and isolating yourself if sick,” he said.

“There is no treatment except to stay well-hydrated,” the doctor added. “[It] generally lasts around 3 days.”

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Neilsen agreed that most people will recover from norovirus in one to three days without any treatment, but others could experience more severe symptoms like dehydration, which “could require medical attention.”

There is no treatment for norovirus, but experts recommend staying well-hydrated. (iStock)

Symptoms of dehydration include decreased urination, dry mouth and throat, dizziness when standing, crying with few or no tears, and unusual sleepiness or fuzziness, according to the CDC.

If norovirus strikes, the agency recommends drinking plenty of liquids to prevent dehydration and to seek medical care if it becomes severe.

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Prevention of norovirus

Steps to avoid norovirus are similar to preventing any other foodborne illness, Neilsen shared.

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“Wash your hands, thoroughly cook your food at the recommended temperatures, properly clean and disinfect surfaces, and avoid contact with others if sick,” he advised.

The CDC also recommends washing fruits and vegetables thoroughly and washing laundry in hot water if possible.

The foods most commonly involved in norovirus outbreaks are leafy greens, fresh fruits and shellfish, according to the CDC. (iStock)

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The doctor reiterated how cases in the U.S. have been rising since 2023, but there is no clear research into the reasons why.

Norovirus typically peaks between November and April, according to Neilsen, most likely due to “seasonality trends” that are similar to other contagious viruses thriving during this time, like the flu.

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“The combination of indoor spaces, close contact and crowding is why norovirus thrives in environments like schools, daycares and cruise ships,” he said. 

Norovirus commonly spreads in crowded spaces, like schools and daycares. (iStock)

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“Once an outbreak starts, it’s challenging to control it without public health and sanitation expertise.”

Norovirus can be difficult to kill, Neilsen noted. He recommends using bleach to clean contaminated surfaces.

 

Some people may still be contagious after recovery. Experts recommend proceeding with caution and continuing disinfection routines.

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New cancer vaccine delivers stunning result against one of the deadliest skin cancers

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New cancer vaccine delivers stunning result against one of the deadliest skin cancers

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A new injectable therapy is showing positive results in reducing melanoma throughout a five-year period.

The personalized mRNA cancer therapy, called intismeran autogene, combined with the cancer immunotherapy drug KEYTRUDA (pembrolizumab), is a collaboration between Merck and Moderna.

The results from the phase 2b KEYNOTE-942 study were presented at the American Society of Clinical Oncology (ASCO) Annual Meeting in Chicago on May 27.

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After about a five-year follow-up, the combo drug was found to reduce the risk of melanoma recurrence or death by 49% compared to pembrolizumab alone.

The researchers analyzed data from 157 patients with high-risk stage 3 and 4 melanoma whose cancer had been removed via surgery. The participants were split into two groups — one received the combo therapy and the other only received pembrolizumab, according to a press release.

The therapy was found to reduce the risk of melanoma recurrence or death by 49% compared to pembrolizumab alone after a five-year follow-up. (iStock)

The findings revealed that the combination group saw benefits that were “sustained and durable over time.”

Intismeran autogene is designed using mutations identified in a patient’s own tumor, with the intention of teaching the immune system what the cancer looks like so that it can recognize and attack it.

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According to the researchers, intismeran is “well-tolerated” with a “manageable” safety profile. 

The most commonly cited side effects of the personalized mRNA vaccine plus KEYTRUDA were fatigue, injection-site pain, chills, fever and headache. The researchers reported no new long-term safety concerns and no severe vaccine-related adverse events.

The combination therapy is currently being evaluated in a phase 3 study — the final confirmation stage.

Patients with late-stage melanoma have a “significant risk” of cancer recurrence, according to an expert. (iStock)

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In a Merck press release from January, Kyle Holen, MD, Moderna’s senior vice president and head of development, oncology and therapeutics, noted that this data highlights the “potential of a prolonged benefit … in patients with resected high-risk melanoma.”

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“We continue to invest in our platform in oncology because of encouraging outcomes like these, which illustrate mRNA’s potential in cancer care,” he said.  

Dr. Marjorie Green, senior vice president and head of oncology, global clinical development at Merck Research Laboratories, also commented that for many patients with stage 3 or 4 melanoma, there is a “significant risk of recurrence following surgery.”

Researchers confirmed that the combination therapy is currently being evaluated in a phase 3 study. (iStock)

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“As such, demonstrating the longer-term potential of intismeran autogene and KEYTRUDA to reduce the risk of recurrence for certain patients with melanoma is a meaningful milestone,” she said.

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The company cited encouraging five-year follow-up data and pointed to upcoming late-stage INTerpath trial results with Moderna in several hard-to-treat cancers.

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New ways to prevent flu revealed in ‘accidental’ lab breakthrough, study finds

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New ways to prevent flu revealed in ‘accidental’ lab breakthrough, study finds

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An accidental lab discovery has opened the door to entirely new ways of preventing the flu.

While investigating how influenza replicates, researchers discovered that different flu strains use completely different strategies to infiltrate human cells, SWNS reported.

By targeting the specific molecules the viruses rely on, scientists found that they could block them from entering new cells and halt their replication altogether.

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Researchers say these “fundamental insights” into seasonal influenza highlight a clear path toward developing better preventive medications.

“The hope is that fundamental, curiosity-based research like this helps to pave the way for novel strategies to treat and prevent influenza infections,” principal investigator Dr. Emily Bruce, from the University of Vermont’s Larner College of Medicine, said in the SWNS report.

While investigating how influenza replicates, researchers discovered that different flu strains use completely different strategies to infiltrate human cells. (iStock)

While several flu strains cause illness, H1N1 and H3N2 influenza A viruses are the most common. However, current flu tests cannot differentiate between them, and clinical treatments are identical for both.

Although vaccines and antivirals are available, Bruce noted a “dire” need for better medications to stop the virus from spreading cell to xxcell.

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“You don’t get sick when a virus is in one cell,” he noted. “You get sick because a virus replicates itself and goes into many more cells.”

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The study, which was published in The Journal of Virology, originally aimed to map how viral RNA segments are transported within cells to create new viral particles.

The team used H1N1 and H3N2 viruses isolated from the nasal passages of positive patients in 2022.

Clinical treatments remain identical for both primary strains of the flu virus. (iStock)

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During the investigation, the team unexpectedly stumbled upon a cellular pathway that blocked the virus from entering lung cells, SWNS reported.

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The data revealed that when a specific human protein called Rab11B was depleted, H3N2 viruses failed to enter human lung cells. H1N1 viruses were completely unaffected.

Using reverse genetics, the team mapped this defect and uncovered a brand-new, H3N2-specific role for Rab11B during viral entry.

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This discovery challenged the scientific assumption that all flu viruses enter cells the same way.

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“Viruses are like pirates from different countries hijacking someone’s ship,” Bruce said. “Different viruses, like different types of pirates, use different methods to get onboard.”

This discovery challenged the scientific assumption that all flu viruses enter cells the same way. (iStock)

“We had previously thought that all flu viruses used the same way to get into a cell, but we discovered that this is not true,” she went on. “H1N1 and H3N2 need different proteins to get in, and if you get rid of the right protein, a specific virus can’t get in.”

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While these findings identify a critical cellular pathway for viral entry, the study was conducted using isolated cells, the researchers acknowledged.

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Further research is needed to determine whether blocking the protein is safe and effective within a live, complex human respiratory system.

Bruce and the team hope to conduct further research to determine whether this Rab11B-dependency is a fundamental property of H3N2, or if it’s a trait unique to currently circulating flu strains.

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One extra serving of processed meat a day linked to higher cancer risk

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One extra serving of processed meat a day linked to higher cancer risk

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Eating processed meat like ham, sausage and bacon may be linked to a higher risk of certain types of cancer, according to new research.

While health organizations have already confirmed that processed meat can contribute to colon cancer, this study looked closer at cancers in the upper digestive tract, where the link has historically been less clear.

To understand these connections, researchers from the European Prospective Investigation into Cancer and Nutrition (EPIC), one of the world’s largest long-term nutrition and cancer cohorts, tracked the health and diets of 450,112 people across Europe for an average of 14 years. 

FREQUENT HEARTBURN MAY BE A WARNING SIGN OF A MORE DANGEROUS CONDITION, DOCTOR SAYS

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The study group included 131,426 men and 318,686 women, according to the study’s press release.

During the follow-up period, 876 people developed stomach cancer and 215 people developed esophageal adenocarcinoma, which is cancer of the tube connecting the mouth to the stomach.

For female participants, eating both processed meat and white meat was linked to an increased risk of developing the disease. (iStock)

Researchers tracked where the stomach cancers grew, separating them into the upper part of the stomach near the throat and the lower part of the stomach.

The researchers also sorted the tumors into two categories based on how the cancer cells appeared under a microscope: intestinal, which forms more organized structures, and diffuse, in which the cells are more scattered throughout the tissue.

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After adjusting for other lifestyle factors, the researchers found that for every extra 30 grams of processed meat a person ate per day, their overall risk of stomach cancer went up by 9%. Eating that same extra 30 grams a day was also linked to a 13% higher risk of esophageal adenocarcinoma.

A standard single slice of regular deli-sliced ham or lunch meat averages around 28 grams, according to USDA data and nutritional tracking databases.

An extra 20 grams of white meat, such as chicken and turkey, was linked to a 12% higher risk of cancer in the main body of the stomach. (iStock)

An extra 20 grams of white meat, such as chicken or turkey, was linked to a 12% higher risk of cancer in the main body of the stomach, the researchers noted.

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The study also revealed differences between men and women. For male participants, only processed meat showed a clear, statistically significant link to a higher risk of stomach cancer. For female participants, however, eating both processed meat and white meat was linked to an increased risk.

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These findings align with global health benchmarks, particularly those established by the World Health Organization’s International Agency for Research on Cancer.

The agency has long classified processed meat as a known human carcinogen, primarily due to its strong, well-documented links to colorectal cancer.

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However, health organizations have also consistently pointed to a potential, yet less definitive, relationship between these meats and cancers of the stomach.

Eating 30 grams of processed meat a day, or the equivalent to one slice of ham, was linked to a 13% higher risk of esophageal adenocarcinoma. (iStock)

Further scientific investigation is needed to confirm the findings and to account for other underlying risk factors, such as certain stomach infections, which could interact with dietary habits.

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A key limitation of the study is its reliance on self-reported diets, which can sometimes lead to inaccuracies in how participants recall their meat consumption over time, the researchers noted.

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The findings were published in the International Journal of Cancer.

Fox News Digital reached out to the researchers requesting comment.

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