A new study suggests that a common vaccine may do more than just prevent a painful skin condition. Researchers have found that the shingles vaccine may also greatly reduce the risk of serious heart problems in people who already have heart disease.
The study was presented at the American College of Cardiology’s Annual Scientific Session 2026, held in New Orleans from March 28 to 30.
It focused on people with a condition called atherosclerotic heart disease, which happens when fatty deposits build up in the arteries and reduce blood flow. This condition is a major cause of heart attacks and strokes.
Heart disease is one of the leading causes of death worldwide. Many people who have it are at high risk of further complications, even if they are already receiving treatment. Because of this, finding simple ways to reduce risk is very important.
The shingles vaccine is usually given to prevent shingles, a painful rash caused by the same virus that causes chickenpox. After a person recovers from chickenpox, the virus stays in the body and can become active again later in life, leading to shingles. This is more common in older adults and people with weaker immune systems.
Doctors have long known that shingles can cause more than just a rash. It can also trigger inflammation in the body and increase the risk of blood clots. These clots can lead to serious problems such as heart attacks, strokes, and other cardiovascular events.
Because of this link, researchers wanted to find out whether preventing shingles could also reduce the risk of heart problems. To do this, they analyzed health data from more than 246,000 adults in the United States who had atherosclerotic heart disease.
The study used a large medical database that includes records from millions of patients. Researchers compared two groups of people aged 50 and older.
One group had received at least one dose of a shingles vaccine, either Shingrix or Zostavax, while the other group had not been vaccinated. The two groups were matched to be similar in terms of age, health conditions, and other factors.
The researchers then looked at what happened over the following year. They focused on serious heart-related events, including heart attacks, strokes, heart failure, and death.
The results were striking. People who received the shingles vaccine were much less likely to experience serious heart problems. Overall, vaccinated individuals had a 46 percent lower risk of major heart events. They were also 66 percent less likely to die from any cause during the study period.
Looking at specific conditions, vaccinated people had a 32 percent lower risk of heart attack, a 25 percent lower risk of stroke, and a 25 percent lower risk of heart failure. These are large reductions and suggest that the vaccine may offer strong protection.
The lead researcher, Dr. Robert Nguyen from the University of California, Riverside, said that these benefits may be especially important for people who already have heart disease. He noted that the level of risk reduction seen in the study is similar to what is expected when someone quits smoking, which is known to greatly improve heart health.
Health authorities such as the Centers for Disease Control and Prevention already recommend the shingles vaccine for adults aged 50 and older. This study adds another reason why people may consider getting vaccinated.
However, it is important to understand the limits of the research. The study looked at outcomes during the first year after vaccination, so it is not clear how long the benefits last. Some earlier research suggests that the protective effects may continue for several years.
Another important point is that people who choose to get vaccinated may also have healthier lifestyles. They may be more likely to exercise, eat well, or follow medical advice. Although the researchers tried to account for these factors, they cannot be completely ruled out.
Because of this, the study shows a strong link between vaccination and lower heart risk, but it does not prove that the vaccine directly causes these benefits. More research, including clinical trials, would be needed to confirm this.
Even so, the large number of participants and the careful analysis make the findings meaningful. They suggest that preventing infections like shingles may have wider health benefits than previously thought.
From a broader perspective, this study highlights how vaccines can protect not just against infections but also against other serious health problems. It shows that simple preventive steps may have powerful effects on overall health.
In conclusion, the shingles vaccine may offer more than protection against a painful rash. It could also help reduce the risk of life-threatening heart problems, especially in people who are already at high risk. While more research is needed, these findings provide another strong reason to consider vaccination as part of a healthy lifestyle.
If you care about heart disease, please read studies that herbal supplements could harm your heart rhythm, and how eating eggs can help reduce heart disease risk.
For more health information, please see recent studies that apple juice could benefit your heart health, and results showing yogurt may help lower the death risks in heart disease.
The research findings were presented at the American College of Cardiology Annual Scientific Session 2026.
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