Health
Nearly 40% of cancers can be prevented with 3 lifestyle changes, study finds
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Nearly half of cancers could be avoided by cutting out three major risk factors, a new study has revealed.
Research published this week in Nature Medicine identified that nearly 40% of global cancer cases are linked to tobacco (15% of new cases), infections (10%) and alcohol consumption (3%).
Overall, 7.1 million cancer diagnoses in 2022 were linked to 30 modifiable risk factors, according to the study.
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“The key here is that almost half of all cancers could be prevented by behavioral changes,” Dr. Marc Siegel, Fox News Digital senior medical analyst, told Fox News Digital.
Conducted by the World Health Organization and its International Agency for Research on Cancer (IARC), the study analyzed global cancer data across 185 countries, matching it with exposure data for the 30 risk factors.
Nearly half of cancers could be avoided by cutting out three major risk factors, a new study has revealed. (iStock)
Lung, stomach and cervical cancers accounted for nearly half of the cases that were linked to modifiable risks, with many linked to viruses and bacteria like the human papillomavirus (HPV), hepatitis B and C, and Helicobacter pylori (a common bacterium that infects the stomach lining).
“Preventable cancers of the cervix and throat are directly linked to the HPV virus and can be prevented by the HPV vaccine,” added Siegel, who was not involved in the study.
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Lung cancer, throat and GI cancers, and several others were linked to cigarette smoking, and alcohol was associated with breast, liver, colon and throat cancer, the doctor noted.
“Environmental factors are also key, varying by geography — 45% of new cancers could be prevented in men, and 30% in women,” he said.
Lung, stomach and cervical cancers accounted for nearly half of the cases that were linked to modifiable risks. (iStock)
Study author Hanna Fink, from the Cancer Surveillance Branch at IARC/WHO, said the main message is that many cancers can be prevented.
“Almost four in 10 new cancer cases worldwide, which represent 7.1 million lives that don’t need to be changed by a cancer diagnosis, were linked to things we can change or modify through awareness and public-health action,” she told Fox News Digital.
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“These things include tobacco smoking, infections, alcohol consumption, excess body weight, air pollution, ultraviolet radiation and others.”
Looking ahead, the researchers recommend that stronger prevention strategies targeting tobacco use, infections, unhealthy body weight and alcohol use could substantially reduce global cancer cases.
“The key here is that almost half of all cancers could be prevented by behavioral changes.”
“The study reinforces that cancer prevention works, and action is most effective at the population level,” Fink said.
“Governments and communities play a crucial role by making healthy choices easier, for example, through higher tobacco and alcohol taxes, smoke-free policies, clear health warnings, safer workplaces, cleaner air, and affordable access to vaccination and screening. Individuals can support these by advocating for healthier environments and using available preventive services.”
Reducing the risk
The AIRC offers the following recommendations to minimize cancer risk.
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- Do not smoke, and if you do smoke, seek help to quit.
- Keep alcohol intake as low as possible, as “there is no safe level of alcohol for cancer risk.”
- Aim for a healthy body weight over time with a balanced diet and regular physical activity.
- Move more and sit less, as even small amounts of daily movement help.
- Take advantage of vaccines, especially the HPV vaccination for young people and the hepatitis B vaccination.
Tobacco was linked to 15% of new cancer cases, making it the largest modifiable risk factor. (iStock)
“As a family physician, I try to help my patients understand how important their daily habits are in lowering their future cancer risk,” said Dr. Chris Scuderi, a cancer survivor and Florida-based family physician.
The doctor’s key prevention targets include daily exercise, consistent and restorative sleep, a Mediterranean-style diet, regular doctor’s visits and sufficient rest.
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“Small daily wins add up to make a powerful difference over time,” added Scuderi, who also was not involved in the research. “It’s also essential to stay on top of your routine screenings, which your family physician can help you with.”
Potential limitations
The study did have some limitations. The researchers often used data from around 2012 due to the long delay between exposure and cancer, which means the data may not reflect the most recent behaviors or environments.
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“This is a necessary simplification, because in reality, latency can be longer or shorter depending on the cancer and the exposure,” Fink noted.
A doctor recommended daily exercise, consistent and restorative sleep, a Mediterranean-style diet, regular doctor’s visits and sufficient rest to help reduce risk. (iStock)
Siegel pointed out that cancer types vary by geographic region — for example, stomach cancer is more prominent in Asia — and the relationships between risk factors and cancer prevalence can differ between countries, populations and time periods.
“We rely on the best available data on how common each risk factor is in different countries and how strongly it is linked to cancer, but these data are not perfect and are weaker in some low- and middle-income countries,” Fink said.
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Finally, the study only looked at 30 risk factors with the strongest evidence and global data.
“Our estimate of ‘almost 40% of cancers are preventable’ is very likely conservative,” the researcher added. “Some other suspected causes, such as certain aspects of diet, could not be included because the science or the data are not yet robust enough at a global level.”
Ants can be a nuisance. Just ask officials at a hospital in Canada who are dealing with an “appearance of ants within the operating room” that has forced them to indefinitely suspend some surgeries there.
The ants appeared recently at Carman Memorial Hospital in Carman Manitoba, according to a statement from Southern Health-Santé Sud, the provincial authority that oversees the hospital.
It was not clear when the hospital would resume operations, but Southern Health said on Friday that a “limited number of elective surgeries” had been postponed and that the hospital was working with patients to reschedule them. Portage Online, a local news website, reported that 16 operations had been postponed, citing information from Southern Health.
It’s not the first time ants have disrupted operations at the hospital. The insects appeared there in August 2024, but “the issue resolved within a few weeks,” Southern Health said. They returned last summer. But with their reappearance this week, the hospital said it was taking more drastic measures. The hospital serves the area around Carman, a town with a population of around 3,000 residents about 47 miles southwest of Winnipeg.
“Any factor that could impact the safety or integrity of the operating room environment requires the suspension of surgical activity until the issue can be resolved,” Southern Health said. “The safety of patients, staff and physicians is paramount.”
The hospital is working with exterminators “to identify the source of the ants and implement additional measures and support a long-term resolution.” Southern Health told Portage Online that exterminators had “surveyed and cleaned drains, opened walls and sealed cracks.”
“Several methods have been used to bait the ants in an effort to find where they are originating from,” the authority said.
In a separate statement to the CBC, Southern Health said that it believed that an ant colony had made its home near the hospital and that they appeared to be “simply seeking food sources inside buildings as ants are known to do.”
The hospital also told the CBC that the ant problem at the hospital did not amount to an “infestation.”
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The U.S. government is moving to evacuate American passengers from a cruise ship linked to a deadly hantavirus outbreak, with plans to transport them to a military base in Nebraska for quarantine and monitoring, federal health officials said Friday.
The Centers for Disease Control and Prevention said the risk to the American public remains extremely low as officials move forward with a medical repatriation flight for passengers aboard the M/V Hondius.
President Donald Trump said earlier Friday that the situation appears to be under control, pointing to the virus being difficult to transmit.
“We have very good people looking at it. It seems to be okay. They know the virus very well. They’ve worked with it for a long time. They know it very well. Not easy to pass on. So we hope that’s true,” he said.
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Health workers in protective gear evacuate patients from the MV Hondius cruise ship at a port in Praia, Cape Verde, on May 6, 2026. (Misper Apawu/AP)
“We seem to have things under very good control. They know that virus very well. It’s been around a long time. Not easily transferable, unlike COVID. But we’ll see. We have very good people studying it very closely.”
The outbreak has escalated over several weeks, beginning with a passenger who became sick in early April and later resulting in at least three deaths, according to the World Health Organization.
Cases are now reported across multiple countries after passengers disembarked in Africa and Europe, prompting health officials to trace contacts globally.
Authorities in Cape Verde at one point blocked passengers from leaving the ship, underscoring concerns about containment.
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An ambulance evacuates patients from the MV Hondius cruise ship to the airport in Praia, Cape Verde, on May 6, 2026. (Misper Apawu/AP)
Hantavirus is a rare but potentially deadly disease typically spread through contact with infected rodents or their droppings, according to the CDC. While most strains do not spread between people, health officials say the Andes virus — identified in some cases linked to the cruise ship — is the only known strain capable of limited person-to-person transmission.
The vessel is expected to dock in Spain’s Canary Islands, where international teams are coordinating next steps for passengers and crew.
A CDC team has been deployed to the Canary Islands to assess potential exposure among American passengers and determine monitoring needs.
Returning passengers are expected to be flown on a U.S. government medical repatriation flight to Offutt Air Force Base in Omaha, Nebraska.
Health workers in protective gear evacuate patients from the MV Hondius cruise ship into an ambulance at a port in Praia, Cape Verde, on May 6, 2026. (Misper Apawu/AP)
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They will then be transported to the National Quarantine Center at the University of Nebraska Medical Center for further monitoring.
Additional CDC personnel will be stationed at Offutt Air Force Base to support health assessments.
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From tracking sleep and steps to monitoring heart rate, temperature and stress levels, wearable devices like smartwatches and rings are growing in popularity as wellness tools.
Fox News’ Brian Kilmeade recently used one of these — an Oura ring — to track his metrics from the early morning hours through a demanding work schedule and reported the results live on “Fox & Friends.”
“I just got four hours and one minute [of sleep], but I have some REM sleep, 14%, over 20% of deep sleep. Feeling pretty good, I feel pretty fresh,” Kilmeade shared during his first early morning update, reviewing the stats from his ring.
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Throughout the day, the wearable tracked his physiological responses to various environments, from the stress of a live television broadcast to the physical exertion of a workout.
Wearable devices are changing cardiology’s landscape, helping detect conditions like atrial fibrillation early, a cardiologist said. (iStock)
Kilmeade observed the data in real time, noting, “You see the stress level spike just a little bit … as I make my way over to radio, my activity is going to pick up.”
By the end of his day, which included a trip to West Point and hours spent in a car, the device provided a summary of Kilmeade’s activity levels and heart rate stability.
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Dr. Craig Basman, a New Jersey cardiologist, joined the program to interpret the data and discuss the clinical implications of such technology.
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Basman immediately addressed Kilmeade’s limited rest. “Well, I don’t think you have to be a cardiologist to diagnose him with suboptimal sleep,” he said.
The cardiologist urged users to treat the data as a catalyst for lifestyle changes. (iStock)
However, the doctor highlighted the broader potential of these tools, explaining that “these wearable devices are changing the landscape of cardiology” and that “the future is bright, not just for preventative care … but also screening and detection of actual cardiovascular pathology.”
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The cardiologist urged users to treat the data as a catalyst for lifestyle changes, noting that he wouldn’t recommend detection tools unless you’re “going to do something about it.”
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Regarding the accuracy of the technology, Basman said there is “robust data” to suggest that the numbers are “incredibly accurate” for a lot of the metrics people are viewing, specifically data like resting heart rate and heart rate variability.
Wearable health tech like watches and rings can track sleep, heart rate and stress. (iStock)
He also mentioned that some devices can detect serious conditions like atrial fibrillation, which affects millions and can often go undetected during a standard physical exam.
For younger individuals, wearables can serve as a “great primary prevention tool,” according to the doctor, given that plaque can begin to develop in the arteries as early as the 20s and 30s.
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For the older population, the devices act more as a “screening tool for actual existing cardiac pathology,” he added.
Anyone concerned about wearable health data should consult a doctor for medical guidance.
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