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Notorious ‘winter vomiting bug’ rising in California. A new norovirus strain could make it worse

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Notorious ‘winter vomiting bug’ rising in California. A new norovirus strain could make it worse

The dreaded norovirus — the “vomiting bug” that often causes stomach flu symptoms — is climbing again in California, and doctors warn that a new subvariant could make even more people sick this season.

In L.A. County, concentrations of norovirus are already on the rise in wastewater, indicating increased circulation of the disease, the local Department of Public Health told the Los Angeles Times.

Norovirus levels are increasing across California, and the rise is especially notable in the San Francisco Bay Area and L.A., according to the California Department of Public Health.

And the rate at which norovirus tests are confirming infection is rising nationally and in the Western U.S. For the week that ended Nov. 22, the test positivity rate nationally was 11.69%, up from 8.66% two months earlier. In the West, it was even worse: 14.08%, up from 9.59%, according to the U.S. Centers for Disease Control and Prevention.

Norovirus is extraordinarily contagious, and is America’s leading cause of vomiting and diarrhea, according to the CDC. Outbreaks typically happen in the cooler months between November and April.

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Clouding the picture is the recent emergence of a new norovirus strain — GII.17. Such a development can result in 50% more norovirus illness than typical, the CDC says.

“If your immune system isn’t used to something that comes around, a lot of people get infected,” said Dr. Peter Chin-Hong, an infectious diseases expert at UC San Francisco.

During the 2024-25 winter season, GII.17 overthrew the previous dominant norovirus strain, GII.4, that had been responsible for more than half of national norovirus outbreaks over the preceding decade. The ancestor of the GII.17 strain probably came from a subvariant that triggered an outbreak in Romania in 2021, according to CDC scientists.

GII.17 vaulted in prominence during last winter’s norovirus surge and was ultimately responsible for about 75% of outbreaks of the disease nationally.

The strain’s emergence coincided with a particularly bad year for norovirus, one that started unusually early in October 2024, peaked earlier than normal the following January and stretched into the summer, according to CDC scientists writing in the journal Emerging Infectious Diseases.

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During the three prior seasons, when GII.4 was dominant, norovirus activity had been relatively stable, Chin-Hong said.

Norovirus can cause substantial disruptions — as many parents know all too well. An elementary school in Massachusetts was forced to cancel all classes on Thursday and Friday because of the “high volume of stomach illness cases,” which was suspected to be driven by norovirus.

More than 130 students at Roberts Elementary School in Medford, Mass., were absent Wednesday, and administrators said there probably wouldn’t be a “reasonable number of students and staff” to resume classes Friday. A company was hired to perform a deep clean of the school’s classrooms, doorknobs and kitchen equipment.

Some places in California, however, aren’t seeing major norovirus activity so far this season. Statewide, while norovirus levels in wastewater are increasing, they still remain low, the California Department of Public Health said.

There have been 32 lab-confirmed norovirus outbreaks reported to the California Department of Public Health so far this year. Last year, there were 69.

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Officials caution the numbers don’t necessarily reflect how bad norovirus is in a particular year, as many outbreaks are not lab-confirmed, and an outbreak can affect either a small or large number of people.

Between Aug. 1 and Nov. 13, there were 153 norovirus outbreaks publicly reported nationally, according to the CDC. During the same period last year, there were 235.

UCLA hasn’t reported an increase in the number of norovirus tests ordered, nor has it seen a significant increase in test positivity rates. Chin-Hong said he likewise hasn’t seen a big increase at UC San Francisco.

“Things are relatively still stable clinically in California, but I think it’s just some amount of time before it comes here,” Chin-Hong said.

In a typical year, norovirus causes 2.27 million outpatient clinic visits, mostly young children; 465,000 emergency department visits, 109,000 hospitalizations, and 900 deaths, mostly among seniors age 65 and older.

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People with severe ongoing vomiting, profound diarrhea and dehydration may need to seek medical attention to get hydration intravenously.

“Children who are dehydrated may cry with few or no tears and be unusually sleepy or fussy,” the CDC says. Sports drinks can help with mild dehydration, but what may be more helpful are oral rehydration fluids that can be bought over the counter.

Children under the age of 5 and adults 85 and older are most likely to need to visit an emergency room or clinic because of norovirus, and should not hesitate to seek care, experts say.

“Everyone’s at risk, but the people who you worry about, the ones that we see in the hospital, are the very young and very old,” Chin-Hong said.

Those at highest risk are babies, because it doesn’t take much to cause potentially serious problems. Newborns are at risk for necrotizing enterocolitis, a life-threatening inflammation of the intestine that virtually only affects new babies, according to the National Library of Medicine.

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Whereas healthy people generally clear the virus in one to three days, immune-compromised individuals can continue to have diarrhea for a long time “because their body’s immune system can’t neutralize the virus as effectively,” Chin-Hong said.

The main way people get norovirus is by accidentally drinking water or eating food contaminated with fecal matter, or touching a contaminated surface and then placing their fingers in their mouths.

People usually develop symptoms 12 to 48 hours after they’re exposed to the virus.

Hand sanitizer does not work well against norovirus — meaning that proper handwashing is vital, experts say.

People should lather their hands with soap and scrub for at least 20 seconds, including the back of their hands, between their fingers and under their nails, before rinsing and drying, the CDC says.

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One helpful way to keep track of time is to hum the “Happy Birthday” song from beginning to end twice, the CDC says. Chin-Hong says his favorite is the chorus of Kelly Clarkson’s “Since U Been Gone.”

If you’re living with someone with norovirus, “you really have to clean surfaces and stuff if they’re touching it,” Chin-Hong said. Contamination is shockingly easy. Even just breathing out little saliva droplets on food that is later consumed by someone else can spread infection.

Throw out food that might be contaminated with norovirus, the CDC says. Noroviruses are relatively resistant to heat and can survive temperatures as high as 145 degrees.

Norovirus is so contagious that even just 10 viral particles are enough to cause infection. By contrast, it takes ingesting thousands of salmonella particles to get sick from that bacterium.

People are most contagious when they are sick with norovirus — but they can still be infectious even after they feel better, the CDC says.

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The CDC advises staying home for 48 hours after infection. Some studies have even shown that “you can still spread norovirus for two weeks or more after you feel better,” according to the CDC.

The CDC also recommends washing laundry in hot water.

Besides schools, other places where norovirus can spread quickly are cruise ships, day-care centers and prisons, Chin-Hong said.

The most recent norovirus outbreak on a cruise ship reported by the CDC is on the ship AIDAdiva, which set sail on Nov. 10 from Germany. Out of 2,007 passengers on board, 4.8% have reported being ill. The outbreak was first reported on Nov. 30 following stops that month at the Isle of Portland, England; Halifax, Canada; Boston; New York City; Charleston, S.C.; and Miami.

According to CruiseMapper, the ship was set to make stops in Puerto Vallarta on Saturday, San Diego on Tuesday, Los Angeles on Wednesday, Santa Barbara on Thursday and San Francisco between Dec. 19-21.

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Leaked memo reveals California debated cutting wildfire soil testing before disaster chief’s exit

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Leaked memo reveals California debated cutting wildfire soil testing before disaster chief’s exit

California Gov. Gavin Newsom’s disaster chief quietly retired in late December amid criticism over the state’s indecisive stance on whether soil testing was necessary to protect survivors of the Eaton and Palisades fires.

One year ago, Nancy Ward, then the director of the California Governor’s Office of Emergency Services (Cal OES), petitioned the Federal Emergency Management Agency to spearhead the cleanup of toxic ash and fire debris cloaking more than 12,000 homes across Los Angeles County.

Although Ward’s decision ensured the federal government would assume the bulk of disaster costs, it came with a major trade off. FEMA was unwilling to pay for soil sampling to confirm these homes weren’t still heavily contaminated with toxic substances after the cleanup — testing that California state agencies have typically done following similar fires in the past.

Following intense backlash from fire survivors and California lawmakers, Ward pleaded with FEMA to reconsider its soil-testing stance, writing in a Feb. 19 letter that it is “critical to protect public health” and “ensure that survivors can safely return to their homes.” Her request was denied.

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However, in October, Cal OES — under Ward’s leadership — privately considered discontinuing state funding for soil testing in the aftermath of future wildfires, according to a confidential, internal draft memo obtained by the Los Angeles Times.

The Times requested an interview with Ward, and sent questions to her office asking about her initial decision to forgo soil testing and for clarity on the future of state’s fire recovery policy. Ward declined the request; The Times later published an article on Dec. 29 about allegations that federal contractors illegally dumped toxic ash and misused contaminated soil in breach of state policy.

Ward, who served as Cal OES director for three years, retired on Dec. 30; her deputy director, Christina Curry, stepped into the role as the interim chief. Ward also did not respond to several requests for comment for this article.

Ward was the first woman to serve as Cal OES director. She had also previously served as a FEMA regional administrator, overseeing federal disaster response in the Southwest and Pacific Islands from 2006 to 2014.

A Cal OES spokesperson said Ward’s retirement had been planned well in advance.

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“Director Nancy Ward has been a steady hand and a compassionate leader through some of California’s largest disasters,” the spokesperson said. “Her decades of service have made our state stronger, safer, and more resilient. The Governor is deeply grateful for her dedication and wishes her the very best in retirement.”

The internal memo obtained by The Times was written by Ward’s assistant director, and titled: “Should the state continue to pay for soil testing as part of Private Property Debris Removal (PPDR) programs? ”

It laid out three possible answers: The state could keep funding soil testing after future wildfires; the state could defer soil testing decisions to the affected counties with the possibility of reimbursing them; or the state could stop paying for soil testing entirely.

A Cal OES spokesperson said the memo was only a draft and did not represent a policy change. “The state’s position on soil testing remains unchanged,” the spokesperson said. “California is committed to advocating for the safe, timely removal of wildfire debris. Protecting the public health and well-being of impacted communities remains the state’s foremost priority.”

The primary reason for soil testing is to prevent harmful exposures to toxic metals, such as brain-damaging lead or cancer-causing arsenic. Since 2007, comprehensive soil testing has been conducted after 64 wildfire cleanups in California, according to the memo. When soil contamination still exceeded state benchmarks after the initial cleanup, the state government redeployed cleanup workers to remove more dirt and then retest the properties.

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This approach, the memo said, was critical in identifying harmful substances that “pose exposure hazards via ingestion, inhalation of dust, or through garden/food production.” Soil testing “helps ensure the safety” of children, seniors, pregnant women and people with health issues who are “more vulnerable to soilborne toxins.”

“The State has a long precedent of conducting or paying for soil testing,” the Cal OES assistant director wrote in the memo.  “Pivoting from this would be a significant policy change.”

The memo cites a report from CalRecycle, the agency that has historically carried out state-led fire cleanups, that stresses the importance of the current practice to public health.

“Soil contamination after a wildfire is an invisible threat,” wrote a CalRecycle official. “If not properly cleaned and remediated in a methodical way, property owners may encounter additional hurdles during the rebuilding process and suffer additional trauma.”

“Soil sampling,” the official adds, “is the metric by which Recyclable demonstrates that debris removal operations have successfully remediated the post-disaster threat to public health and the environment.”

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However, such soil testing and additional cleanup prolongs the cleanup timeline and can make it more expensive. The memo cites cost estimates from CalRecycle which show that soil testing and additional cleanup work usually costs some $4,000 to $6,000 per parcel, representing 3% to 6% of overall debris removal costs.

The state cost projections align with those made by independent environmental experts. Andrews Whelton, a Purdue University professor who researches natural disasters, estimated that soil testing and further remediation for the Eaton and Palisades fire would cost between $40 million to $70 million.

All told, the CalRecycle report states the usual soil-testing process has been a “relatively low-cost step” to safeguard public health.

Further, although soil testing may add some cost, when it’s taken as a proactive measure, it can save money down the road.

Forgoing soil testing and evidence-backed remediation can generate uncertainty about toxic contamination, which in turn could lower the value of homes in Altadena and Pacific Palisades, Whelton said. What’s more, the property owner may be liable for soil contamination if they fail to disclose environmental risks when selling or leasing.

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The internal CalOES memo alludes to this give and take: “Funds saved initially by skipping testing may be outweighed by later unseen costs, for example, reinvesting in remediation, addressing community complaints, litigation, or cleanup failure.”

The U.S. Army Corps of Engineers has fielded over 1,100 complaints filed by property owners affected by the Eaton and Palisades fires — over 20% of which were related to the quality of work. According to internal reports obtained by The Times, federal cleanup repeatedly deviated from cleanup protocols, likely spreading contamination in the process.

Since then, FEMA officials have backed down from their hard-line stance against paying for post-fire soil testing in California in an attempt to shore up public confidence in the federal cleanup.

The U.S. Environmental Protection Agency announced this week that FEMA will conduct a limited lead-testing program in the Eaton fire burn scar that is intended to “confirm the effectiveness of cleanup methods,” according to an EPA spokesperson. The initiative has already come under the scrutiny of environmental experts who say it lacks the rigor of California’s soil testing regimen.

It remains unclear if California will continue to implement soil-testing safeguards that made the state a national leader in fire recovery. Though state officials say these will remain unchanged, there is no legal mandate to follow these procedures.

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The internal CalOES memo circulated under Ward’s leadership has only added to the cloud of uncertainty.

One thing is clear: It’s a moot point for survivors of the Eaton and Palisades fire.

As state and federal officials debated the value of soil testing, most Altadena and Pacific Palisades residents have been left to investigate the extent of environmental fallout on their own.

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Flu cases surging in California as officials warn of powerful virus strain

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Flu cases surging in California as officials warn of powerful virus strain

California officials are issuing warnings about a new flu strain that is increasing flu-related cases and hospitalizations statewide, with public health experts across the nation echoing the alerts.

A newly emerged influenza A strain, H3N2 subclade K, is already wreaking havoc globally and is affecting hospitals and clinics in California, the state’s Department of Public Health announced Tuesday. The agency described the seasonal flu activity as “elevated” in the state; data show that flu test positivity rates, which measure the percentage of patients who come in with flu symptoms and actually test positive for influenza, have been rising in recent weeks. However, they are still relatively low compared to last year’s flu season.

“Flu started to rise, in earnest, by mid-December and rates are still up,” said Dr. Elizabeth Hudson, regional physician chief of infectious diseases for Kaiser Permanente. “We are hoping to see some plateauing in the next few weeks, but there’s some delay in data due to recent holidays, so it will become clearer in the next week or so.”

Hudson said most flu-related cases are being treated without the need for hospital admittance, “but those who are older or at higher risk for complications from the flu are the ones we’re mostly seeing admitted.”

According to data from the public health agency, there’s a high rate of positive flu cases in Central California and the Bay Area and a moderate rate around Sacramento and Southern California. In the northern part of the state where it’s more rural, the rate of flu cases is currently low, according to the agency’s website.

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In Los Angeles County, recent data from the health department show that between the end of last year and the start of 2026, there were 162 flu-related hospitalizations and an additional 18 cases in which patients were admitted for intensive care.

Nationally, this flu season has been far worse than in California. According to the Centers for Disease Control and Prevention, this flu season has led to the highest number of cases in the U.S. in more than 30 years. The agency estimates that there have been at least 15 million infections in the U.S., with 180,000 hospitalizations and 7,400 deaths, since late fall. At least two of those who died have been children, said Yvonne Maldonado, the Taube professor of global health and infectious disease at Stanford Medicine, in a news release. The state’s Department of Public Health confirmed that those pediatric flu-associated deaths occurred in California.

Last year, infectious disease experts predicted this flu season would be particularly bad for high-risk groups, specifically children, due to a decline in flu vaccination rates and a “souped-up mutant” flu strain, Dr. Peter Chin-Hong, an infectious diseases expert at UC San Francisco, told The Times.

Last year’s flu season was particularly bad, “but little did we know what was in store for us this year,” said Dr. Neha Nanda, medical director of antimicrobial stewardship with Keck Medicine of USC. Nanda said she is seeing an early upward trend in positive influenza cases this season compared with previous years, though it isn’t quite on par with last year, or from the years preceding COVID — at least in California.

Dr. Sam Torbati, co-chair and medical director of Cedars-Sinai Medical Center’s emergency department, said that around the second week of December he saw a lot of patients coming into his department with flu-related illnesses, part of a surge in hospitalizations that was seen throughout the county.

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He said he doesn’t recall “seeing this many patients becoming this ill.”

“It’s very early in the flu season and may get much worse,” Torbati said.

Experts believe the strain has mutated to “more likely evade” immunity from the current vaccine. That’s because the strain emerged toward the end of the summer, long after health officials had already determined the formula for the flu vaccine.

“Current seasonal flu vaccines remain effective at reducing severe illness and hospitalization, including the currently circulating viruses,” said Dr. Erica Pan, state public health officer.

Even though the flu shot might not keep you from succumbing to the illness, “it lessens your odds of having a severe case, keeps you out of the hospital and shortens the duration of the illness,” said Dr. Michelle Barron, senior medical director of infection prevention and control for UCHealth, in a report by the Assn. of American Medical Colleges.

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Officials are urging the public, especially those at higher risk for severe flu complications such as the very young and older populations, to get vaccinated or take immediate antiviral treatment, such as Tamiflu.

The flu can be very serious with symptoms — fatigue, fever, cough and body aches — that feel like you got “hit by a Mack truck,” Hudson said.

For children and other high-risk individuals, the symptoms can be more severe.

“Children can develop dehydration [or] pneumonia, and more severe cases of flu in kids can lead to inflammation of the brain and heart,” Hudson said.

The problem has not been limited to the U.S. The influenza A strain, H3N2 subclade K, has caused severe flu seasons in Australia, Japan, the United Kingdom and other parts of Europe and Asia.

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Video: Four Astronauts Splash Down on Earth After Early Return

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Video: Four Astronauts Splash Down on Earth After Early Return

new video loaded: Four Astronauts Splash Down on Earth After Early Return

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Four Astronauts Splash Down on Earth After Early Return

Two American astronauts and others from Japan and Russia landed in the Pacific Ocean after an early journey home from the International Space Station because one of them was ill.

You’re getting a live look inside the cabin right now. That’s Crew-11 preparing for their re-entry period. Splashdown of Crew-11. After 167 days in space, Dragon and NASA astronauts Zena Cardman and Mike Fincke, Kimiya Yui of JAXA and Roscosmos cosmonaut Oleg Platonov are back on Earth. The SpaceX recovery ship and team has been waiting for Dragon splashdown, and they will now begin making their way to the splashdown location. And we are seeing motion for Dragon. They are pulling it to the egress platform. And it looks like our first crew member out of the spacecraft is NASA astronaut Mike Fincke.

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Two American astronauts and others from Japan and Russia landed in the Pacific Ocean after an early journey home from the International Space Station because one of them was ill.

By Axel Boada

January 15, 2026

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