19/11/2025
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COVID and the flu may fade fast — but their effects on your heart and brain can last for years.
A sweeping analysis of 155 studies has confirmed a powerful and long-lasting link between viral infections and cardiovascular risk, including heart attacks and strokes.
The data show that the flu can quadruple heart attack risk and increase stroke risk fivefold within the first month after infection. COVID-19 triples the risk of both conditions in the first 14 weeks and keeps the risk elevated for up to a year.
Even chronic infections like HIV, shingles, and hepatitis C leave a cardiovascular footprint—raising heart attack and stroke risks for years. One study noted a 60% higher heart attack risk in people with HIV and an 18% stroke increase linked to shingles.
What ties these viruses to long-term heart and brain health? Inflammation. Even after recovery, viral infections can inflame blood vessels, trigger clotting, and destabilize artery plaques—all of which strain the cardiovascular system. Doctors emphasize that this is yet another reason to protect yourself, particularly during cold and flu season when heart attack rates already spike. Vaccines, hygiene practices, and preventive care don’t just stop short-term illness—they may be critical tools in lowering your lifetime risk of heart and brain damage.
Source: Viral Infections Can Triple the Risk of Heart Attack and Stroke. EverydayHealth, 30 October 2025.