Vaccines Emerge as Fourth Pillar of Heart Care
Experts argue that preventing infections such as flu, shingles and COVID-19 should join blood sugar, cholesterol and blood pressure control in protecting the heart.
Updated on Nov. 3, 2026 in Heart Disease
Experts propose adding vaccination to the standard pillars of cardiac care: blood sugar, cholesterol and blood pressure management. Infections trigger inflammation that can destabilize arterial plaque and promote dangerous clots.
Why it matters
Influenza in people with ischemic heart disease raises the risk of cardiovascular catastrophes more than sixfold, and the effect can outlast the acute illness. Recognizing infection as a cardiac risk factor could shift how prevention is prioritized for heart patients.
An association study of more than 1.2 million adults over 50 linked shingles vaccination to a 23% to 26% drop in serious cardiovascular events, while influenza raised heart attack risk fourfold and stroke risk fivefold in the first month. It remains unclear from the data whether vaccination itself, rather than other factors, accounts for the reduction.
The details
Infections trigger systemic inflammation that can destabilize atherosclerotic plaques; if a plaque ruptures, a clot may block blood flow and cause a heart attack or stroke. Infection also thickens the blood and causes tachycardia, increasing the heart's oxygen demand, and vascular inflammation can persist for weeks or months after symptoms subside.
Timeline
In the first month after flu infection, heart attack risk quadruples and stroke risk rises fivefold.
Elevated cardiovascular risk can persist up to nine months after severe infections.
Elevated cardiovascular risk can persist up to 12 months after COVID-19 infection.
Health Landscape
The proposal extends the shingles vaccination study showing a 23% to 26% reduction in serious cardiovascular events among more than 1.2 million adults over 50. It positions infection control alongside the established pillars of blood sugar, cholesterol and blood pressure management in cardiac care.
People with existing heart conditions may consider discussing flu, shingles and COVID-19 vaccination with their clinicians as part of prevention. Staying current on recommended immunizations could be a practical step alongside managing blood pressure, cholesterol and blood sugar.
The takeaway
Protecting your heart may include preventing infections, since flu and other viruses can sharply raise short-term cardiovascular risk. Ask your clinician whether your vaccinations are up to date.
Further reading
Explore more on Heart Disease and how infections affect cardiovascular health.
