Shingles Vaccine Linked to Lower Heart Disease

Can the shingles vaccine lower cardiovascular risk?

The study reported an association between receiving the current shingles vaccine and lower subsequent risks of coronary heart disease, stroke and heart failure. This is medically plausible but not yet proof of cause and effect: observational studies can identify patterns across large populations, while differences in preventive care, underlying health and healthcare access may partly explain those patterns.

Shingles vaccination already has an established purpose—preventing herpes zoster and its complications, including postherpetic neuralgia. Any cardiovascular benefit would be an additional potential advantage rather than a replacement for proven measures such as controlling blood pressure, treating high cholesterol, avoiding tobacco and managing diabetes.

Why might shingles and heart disease be connected?

Shingles occurs when varicella-zoster virus, which remains dormant after chickenpox, reactivates later in life. The infection triggers inflammation and can sometimes affect blood vessels. Previous research has associated shingles episodes with a temporary increase in vascular events, providing a rationale for studying whether preventing reactivation might also reduce cardiovascular risk.

Several mechanisms remain under investigation. Vaccination could reduce virus-driven inflammation, endothelial injury or clot-promoting responses by preventing shingles. However, healthier people may also be more likely to receive recommended vaccines, so researchers must carefully address this healthy-vaccinee effect and other sources of confounding.

Who should receive the shingles vaccine?

The US Centers for Disease Control and Prevention recommends two doses of recombinant zoster vaccine for immunocompetent adults aged 50 years or older, including people who have previously had shingles or received an older shingles vaccine. It is also recommended for adults aged 19 years or older who are or will be immunodeficient or immunosuppressed because of disease or treatment.

Common reactions include injection-site pain, fatigue, muscle pain, headache, fever and gastrointestinal symptoms. These effects are generally short-lived. People with a history of severe allergic reaction to a vaccine component, those currently experiencing shingles and people who are pregnant should discuss timing or contraindications with a qualified healthcare professional.