Getting the shingles vaccine could do more than just protect you from a painful rash — it might also lower your risk of heart disease and stroke, according to a new study from South Korea.

Published in the European Heart Journal, this large-scale study of more than one million people found that people aged 50 and older who received the shingles vaccine had a 23% lower risk of developing cardiovascular disease. The benefits were particularly strong for younger individuals and men, with the greatest reductions seen up to eight years after vaccination.

How the Shingles Vaccine Works for Heart Health

Shingles, caused by the varicella-zoster virus (VZV), is well known for causing a painful rash. But the virus can also trigger inflammation in blood vessels, which can lead to blood clots and increase the risk of heart disease. Researchers believe that by preventing shingles with vaccination, the vaccine may also reduce this cardiovascular risk.

Hayeon Lee, a coauthor of the study and researcher at Lee Kyung Hee University College of Medicine, explained that shingles-related nerve damage could also disrupt the heart’s rhythm, potentially leading to irregular palpitations or even cardiac arrest.

Who Benefits Most from the Shingles Vaccine?

The study found that the shingles vaccine may be particularly effective for males, people under 60, and even those with unhealthy lifestyles, such as smokers or heavy drinkers. These groups saw a more significant reduction in heart disease risk after vaccination.

Lee emphasized that this research underscores the broader benefits of vaccination, saying, “Vaccines are not just shields against infections, but essential tools for maintaining long-term health.”

A Bigger Picture for Public Health

While the study provides strong evidence of the shingles vaccine’s protective effects, experts caution that more research is needed to confirm a direct causal link between vaccination and reduced heart disease risk. Dr. Sharon Curhan, an epidemiologist at Brigham and Women’s Hospital, noted that this study is the largest of its kind and offers compelling evidence for those considering the vaccine.

It’s also important to note that most adults have already been exposed to the VZV, even if they’ve never had chickenpox. According to the CDC, more than 99% of adults over 50 have had VZV exposure, which means many could benefit from the vaccine, even without a history of chickenpox.

Limitations of the Study

While the findings are promising, there are some important caveats. The study used the older live zoster vaccine, which is no longer available in most countries. This vaccine has since been replaced by Shingrix, a more effective two-dose vaccine. Dr. Pascal Geldsetzer, an assistant professor of medicine at Stanford, emphasized the need for further studies comparing the effectiveness of different vaccine versions and how they affect overall health.

Additionally, because this research relies on a large database rather than a controlled clinical trial, certain variables, like diet and adherence to treatment, may not have been fully accounted for.

Shingles Vaccine’s Other Health Benefits

The shingles vaccine’s potential goes beyond heart disease. Other studies have shown its ability to reduce the risk of dementia by 20%. Research published in April by Dr. Geldsetzer and his team found that the vaccine may help protect the brain from inflammation caused by shingles-related nerve damage.

The shingles vaccine’s benefits seem to extend to other long-term conditions as well, suggesting it could be an important part of maintaining overall health as we age.

Moving Forward

While the study provides valuable insights into the heart-health benefits of the shingles vaccine, experts agree that more research is needed to confirm these findings across diverse populations. The next steps will likely involve randomized clinical trials to get a clearer picture of how the vaccine can be used to prevent both shingles and cardiovascular disease.

Source: CNN – Shingles vaccine reduces risk of heart disease by 23%, study of one million people finds

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The U.S. is experiencing one of the most intense flu seasons in at least 15 years, according to the latest data from the Centers for Disease Control and Prevention (CDC). Flu activity has surged, with a significant rise in doctor’s office visits for flu-like symptoms, making this winter virus season the most severe since the 2009-2010 swine flu pandemic.

Flu Activity Surges Nationwide

The CDC tracks flu activity by monitoring the percentage of doctor’s office visits related to flu-like symptoms. Last week, the numbers exceeded the peak flu seasons of recent years, including the 2009 swine flu outbreak. This suggests an exceptionally high level of flu transmission across the country. While other respiratory illnesses, such as COVID-19 and RSV, can have similar symptoms, current data indicates that COVID-19 cases are on the decline, and RSV cases are also tapering off.

However, the flu remains a major concern, and its impact is being felt across various states. In some regions, the flu has been so severe that it has forced schools to close. For example, in the Godley Independent School District near Fort Worth, Texas, 650 students and 60 staff members were absent due to illness, prompting the district to close for three days. District spokesperson Jeff Meador called it “the worst flu season he could remember,” noting that the vast majority of illnesses were due to the flu, along with some cases of strep throat.

Flu Stats: 24 Million Cases, 310,000 Hospitalizations, 13,000 Deaths

So far this flu season, the CDC estimates that at least 24 million people have contracted the flu, resulting in 310,000 hospitalizations and 13,000 deaths, including 57 children. Traditionally, flu season peaks around February, and officials are bracing for more cases in the coming weeks. Last week, 43 states reported high or very high levels of flu activity, with the South, Southwest, and Western regions being hit the hardest.

A Nationwide Respiratory Surge

In Rochester, New York, Dr. Elizabeth Murray, a pediatric emergency medicine doctor at the University of Rochester Medical Center, noted that while the flu season is intense, it is not necessarily worse than previous peak seasons. However, she emphasized that other respiratory illnesses, including RSV and COVID-19, are still prevalent. “All of the respiratory illnesses are around, with a vengeance,” she added.

Vaccine Uptake and Flu Strains

Despite the severity of the flu season, flu vaccination rates have remained relatively stable. Around 44% of adults and 45% of children have received their flu shots this winter, compared to 44% and 50%, respectively, last year. Health officials strongly recommend that everyone 6 months and older get vaccinated annually to reduce the severity of illness.

As for the effectiveness of the current flu vaccine, the CDC has not yet released detailed reports on how well it’s working this season. Testing results show that two primary strains of flu, Type A H1N1 and Type A H3N2, are responsible for most of the illnesses. The CDC is also closely monitoring Type A H5N1, a bird flu strain that has infected tens of millions of animals worldwide. While it has only infected 67 people in the U.S., officials are keeping a close watch due to its potential for further spread.

How to Protect Yourself from Seasonal Viruses

To avoid getting sick this flu season, doctors recommend taking basic precautions to limit exposure to germs. These include:

• Avoid touching your eyes, nose, and mouth, as germs can spread easily that way.
• Wash your hands regularly with soap and water, especially after touching surfaces in public places.
• Disinfect frequently touched surfaces like doorknobs, light switches, and remote controls.
• Avoid close contact with sick individuals to prevent the spread of illness.

Conclusion

This flu season is proving to be one of the most intense in recent history, with flu cases at alarming levels across the country. Health officials urge the public to take preventative measures, get vaccinated, and be mindful of the other respiratory illnesses circulating this winter. As flu season continues, the CDC will monitor trends closely and provide updates on the effectiveness of the vaccine and the spread of various viral strains.

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Norovirus cases are spiking across the United States this winter, according to the latest data from the Centers for Disease Control and Prevention (CDC). The CDC reports 91 outbreaks of norovirus during the week of Dec. 5, a significant rise from the 69 outbreaks recorded at the end of November. This increase marks the highest number of outbreaks in recent years for this time of year.

Norovirus, a highly contagious stomach virus, typically leads to vomiting and diarrhea, and it tends to spread quickly in crowded places such as nursing homes, schools, cruise ships, and other communal settings. Here’s what you need to know about the virus and how to protect yourself.

What is Norovirus?

Norovirus is the leading cause of foodborne illness in the United States, responsible for 58% of all foodborne infections each year. It is caused by a group of viruses that spread easily, with just 10 viral particles enough to make someone sick.

• Annual Impact: Around 2,500 outbreaks of norovirus are reported each year in the U.S.
• Peak Season: While it can occur year-round, norovirus outbreaks are most common between November and April.

In addition to vomiting and diarrhea, common symptoms include nausea, stomach pain, body aches, headache, and fever.

How Does Norovirus Spread?

Norovirus is highly contagious and spreads in various ways:

• Direct Contact: Through close contact with infected individuals or shared items like food and utensils.
• Contaminated Surfaces: The virus can also spread through contaminated food, water, or surfaces.

Given its ability to spread quickly, it is important to be cautious, especially in settings where people gather closely together.

How Long Does the Illness Last?

The illness caused by norovirus usually develops 12 to 48 hours after exposure to the virus. Most people recover within 1 to 3 days, although symptoms may vary in intensity. Despite its short duration, norovirus remains a serious health concern, causing:

• 19 to 21 million illnesses each year in the U.S.
• 900 deaths annually, primarily among older adults (ages 65 and older).
• 109,000 hospitalizations annually, with young children being particularly vulnerable.
• 465,000 emergency department visits, mainly involving young children.

Who’s Most at Risk?

While anyone can contract norovirus, certain groups are at a higher risk:

• Young children and older adults.
• Those with weakened immune systems are more susceptible to complications, particularly dehydration from vomiting and diarrhea.

There is no specific medication to treat norovirus. The primary treatment is rehydration—drinking fluids like water, clear broths, or oral rehydration solutions. Avoid beverages like coffee, tea, or alcohol, as they can worsen dehydration.

If dehydration symptoms occur—such as dry mouth, dizziness, or fewer urinations—seek medical attention promptly. For children, symptoms like unusual sleepiness, fussiness, or crying with few or no tears may indicate dehydration.

How Can You Protect Yourself?

The best defense against norovirus, especially during peak season, is good hygiene:

1. Handwashing: Wash hands thoroughly with soap and warm water for 20 seconds before eating or preparing food.
2. Disinfecting Surfaces: Regularly clean surfaces with household disinfectants, especially in areas with high foot traffic, to reduce the spread of the virus.

Taking these precautions will help reduce your chances of getting sick and stop the virus from spreading to others.

Stay vigilant during the winter season, especially as norovirus cases rise, and take steps to protect yourself and others from this contagious stomach bug.

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California has declared a state of emergency as bird flu continues to ravage dairy cattle, marking an escalation in the outbreak’s severity. Governor Gavin Newsom announced the measure to mobilize resources and strengthen the state’s response, following the detection of over 300 infected dairy herds in the past month.

California at the Epicenter

The Golden State has emerged as the epicenter of the nation’s bird flu outbreak, with dairy cows in Southern California driving the surge. Gov. Newsom emphasized the urgency of the situation, stating:
“This proclamation ensures agencies have the flexibility needed to combat the virus. While the public’s risk remains low, we are committed to preventing its spread.”

California accounts for nearly half of the confirmed U.S. human cases, heightening concerns about potential spillover into the general population. Scientists warn that the uncontrolled spread among cattle increases the likelihood of mutations that could make the virus more transmissible to humans.

First Severe Human Case Reported in the U.S.

The crisis intensified with the nation’s first severe human case of bird flu, reported in a Louisiana resident. The individual, hospitalized after exposure to infected backyard birds, tested positive for the H5N1 virus—a strain circulating in wild birds and poultry, distinct from the variant affecting dairy cattle.

This strain, known as the D1.1 genotype, has previously caused mild infections in U.S. poultry workers and a severe case in a Canadian teenager. Genetic sequencing of the Louisiana case revealed no immediate evidence of human-to-human transmission, but officials remain vigilant.

CDC: Risk to the Public Remains Low

Dr. Demetre Daskalakis of the CDC reassured the public that the risk of widespread transmission remains low. However, he acknowledged the virus’s history of severe illness globally, emphasizing the need for ongoing monitoring.
“We are sequencing the virus to identify mutations that could signal it’s adapting to infect humans more effectively,” Daskalakis said.

Unexplained Infections Spark Concern

While most human cases are linked to direct contact with infected animals or their products, some have no clear source. Instances in California and Missouri, where exposure pathways remain unidentified, underscore the virus’s unpredictable nature.

Farm workers handling infected cattle or poultry are at the highest risk, with cattle suspected of transmitting the virus through contaminated milk. Despite these risks, the CDC has found no evidence of human-to-human transmission in the U.S.

Global Implications

The Louisiana case, coupled with mutations observed in Canada, has scientists on high alert. These developments suggest the virus could evolve in ways that increase its threat to public health. Further investigation is underway to determine how the Louisiana resident contracted the virus and assess the broader implications.

What’s Next?

Authorities are scaling up surveillance and testing to contain the outbreak. Meanwhile, the public is urged to avoid direct contact with sick or dead birds and to report unusual animal deaths promptly.

The bird flu outbreak serves as a stark reminder of the delicate balance between animal health and human safety, and the need for vigilance in preventing zoonotic threats.

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Public health officials in the United States are closely monitoring the ongoing bird flu outbreak, which has now been linked to raw milk products in California. Known as H5N1, this strain of avian influenza has infected both animals and humans, raising awareness about its risks and the need for preventive measures.

What Is Bird Flu, and What’s Happening in the U.S.?

Bird flu, or avian influenza, is a viral disease primarily affecting birds, caused by Avian Influenza A viruses. While it usually spreads among wild aquatic birds and domestic poultry, this outbreak has taken an unusual turn by infecting dairy cows, a development not previously observed.

Dr. Michael Ben-Aderet, an infectious disease specialist at Cedars-Sinai Medical Center in Los Angeles, described this as a unique occurrence:

“We haven’t seen bird flu cross into dairy cows or create this association with dairy workers before.”

As of now, the Centers for Disease Control and Prevention (CDC) has confirmed 58 human cases across seven states, with California reporting the highest number at 32. All individuals affected had direct contact with infected livestock.

Fortunately, all U.S. cases have been mild, and patients have recovered after receiving antiviral treatment. Experts emphasize that there is no evidence of person-to-person transmission, and the risk to the general public remains low.

Risks Associated with Raw Milk

Concerns about bird flu have extended to dairy products, particularly raw milk. In April, inactive virus fragments were detected in pasteurized milk. However, the pasteurization process ensures the virus cannot cause infection.

Albert Ko, an epidemiologist at Yale School of Public Health, explained:

“Pasteurization inactivates the virus, so even if fragments are found, they are not capable of causing illness.”

Despite this, raw milk remains a potential health hazard. Unlike pasteurized milk, raw milk is not treated to eliminate harmful pathogens, increasing the risk of foodborne illness.

In response to the outbreak, Raw Farm voluntarily recalled all its raw milk and cream products in California after bird flu was detected in its supply. Public health officials warn that handling raw milk can also pose risks.

Dr. Meghan Davis, an associate professor at Johns Hopkins Bloomberg School of Public Health, highlighted this concern:

“Even spilling raw milk on your hands and touching your eyes could expose you to the virus.”

Are We Facing a Bird Flu Pandemic?

Currently, there is no bird flu pandemic in the U.S., and the risk of one remains low. However, each human infection increases the chance of the virus mutating to enable human-to-human transmission.

Health experts are particularly cautious as the winter respiratory virus season approaches. Seasonal flu viruses can exchange genetic material with other influenza strains, potentially creating a hybrid strain capable of spreading between people.

Dr. Ko emphasized the importance of vigilance:

“With so much bird-to-animal transmission and now cattle involvement, the risk of a mutation enabling human-to-human spread is a concern.”

Proactive Measures Against Bird Flu

To prevent future risks, health organizations are taking proactive steps:

• Vaccine Development: The World Health Organization is advancing research into a human bird flu vaccine using mRNA technology.
• Funding for Readiness: In October, the U.S. government allocated $72 million to ensure non-mRNA bird flu vaccines are available if needed.

At this time, there are no recommendations for the general public to receive a bird flu vaccine. However, public health officials encourage awareness and caution, especially among those in contact with animals or raw dairy products.

The bird flu outbreak is a reminder of the interconnectedness of human and animal health. While the immediate risk remains low, staying informed and following safety precautions can help mitigate potential threats.

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