Sometimes medications and vaccines reveal benefits far beyond their original purpose. Researchers recently linked GLP-1 medications to tissue regeneration in joints like the knees. Shingles vaccines may offer another surprising example. In addition to preventing painful shingles infections, growing evidence suggests they may also protect the brain and heart.
Researchers recently found that shingles vaccination may sharply reduce cardiovascular risks in older adults already living with heart disease. Their findings were presented during the annual scientific session of the American College of Cardiology in New Orleans.
What Are the Findings?
Heart disease remains one of the leading causes of death worldwide. Older adults face especially high risks for heart attacks, strokes, and heart failure. Researchers now believe shingles vaccination could help lower some of these dangers.
The study examined electronic health records from nearly 250,000 adults in the United States. All participants were at least 50 years old and had been diagnosed with heart disease between 2018 and 2025. Researchers gathered the information using TriNetX, a large health database containing records from millions of Americans.
About half of the participants had received at least one shingles vaccine dose. These vaccines included Shingrix or Zostavax. Researchers then matched them with a similarly sized unvaccinated control group.
The research team also studied how galloylquinic acids interacted with several important viral components. One target was the SARS-CoV-2 spike protein, which allows the virus to attach to and enter human cells. Researchers also examined PLpro, an enzyme helping the virus evade immune detection. Another target was RNA polymerase, which the virus uses to replicate itself.
From one month to one year after vaccination, the results appeared striking. Vaccinated participants showed a 40% lower risk of major adverse cardiovascular events. They also experienced a 66% lower risk of death from any cause during that timeframe.
The protective effects extended across several major conditions. Vaccinated individuals showed a 32% lower chance of heart attack. Stroke risk fell by roughly 22.5%. Heart failure risk also declined significantly.
Researchers noted that these improvements resemble the cardiovascular benefits seen after quitting smoking. Such findings suggest shingles vaccination may offer broader health protection than previously understood.
Scientists believe the connection may stem from how shingles affects blood vessels and inflammation. Shingles develops when the virus responsible for chickenpox reactivates later in life. The infection can trigger inflammation and clot formation around the brain, heart, and blood vessels.
Previous studies already linked shingles infections to elevated risks of heart attacks, strokes, and dangerous blood clots. By preventing shingles outbreaks, vaccines may stop many of these harmful inflammatory processes before they begin.
The findings also build upon earlier research connecting shingles vaccination to lower dementia risk. Some studies suggest vaccinated individuals may face reduced chances of developing dementia later in life. Researchers continue investigating how reduced inflammation and viral activity may influence long-term brain health.
The Centers for Disease Control and Prevention currently recommends shingles vaccination for adults aged 50 and older. Younger adults with weakened immune systems are also advised to receive the vaccine.
Researchers acknowledged several limitations within the new study. Because the analysis only followed participants for up to one year, longer-term effects remain uncertain. People who receive vaccines may also practice healthier lifestyles overall, potentially influencing outcomes.
Still, researchers adjusted for differences involving health conditions and socioeconomic factors. Combined with the study’s massive sample size and strong statistical methods, they remain confident that shingles vaccination is linked to lower cardiovascular risk in older adults with heart disease.
Conclusion
Shingles vaccines may protect more than nerves and skin. Researchers found vaccinated older adults with heart disease had sharply lower risks for heart attacks, strokes, heart failure, and death. Scientists believe preventing shingles infections may also prevent harmful inflammation and blood clots.
Have an upcoming trip? Passport Health offers a wide variety of options to help keep you safe from disease, including vaccines. Call or book online to schedule your appointment today.
Logan Hamilton is a health and wellness freelance writer for hire. He’s passionate about crafting crystal-clear, captivating, and credible content that elevates brands and establishes trust. When not writing, Logan can be found hiking, sticking his nose in bizarre books, or playing drums in a local rock band. Find him at loganjameshamilton.com.
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