Viral infections such as influenza and COVID-19 do more than cause temporary symptoms like fever, cough, and fatigue—they can significantly increase the risk of heart attack and stroke. Research indicates that the risk of these cardiovascular events rises sharply in the weeks following a viral infection, making recovery more complex than most people realize.
The body’s immune response plays a key role in this increased risk. During an infection, the immune system releases molecules that trigger inflammation and promote blood clotting. Both inflammation and clotting can interfere with normal heart function and persist even after the initial infection has resolved. This immune reaction explains why cardiovascular complications can follow viral infections.
Short-term studies show that individuals with confirmed influenza infections are four times more likely to experience a heart attack and five times more likely to suffer a stroke within the first month. Those who have had COVID-19 face a threefold higher risk of heart attack or stroke in the first 14 weeks after infection. Chronic viral infections, including HIV, hepatitis C, and shingles, also increase long-term cardiovascular risk. People with HIV may have a 60 percent higher chance of heart attack and a 45 percent higher risk of stroke over several years. Similarly, hepatitis C raises the risk of heart attack by 27 percent and stroke by 23 percent, while shingles increases the risk of heart attack by 12 percent and stroke by 18 percent.
Vaccination and infection-prevention strategies are crucial for reducing these risks. The flu, COVID-19, and shingles vaccines not only help prevent infections but are also associated with a lower risk of heart attacks, strokes, and other serious cardiovascular complications. For adults over 50, the shingles vaccine is highly effective in preventing illness and lowering long-term heart risk.
Other preventive measures include wearing masks in crowded areas, practicing good hand hygiene, and avoiding touching the face. Adults are also encouraged to get tested for HIV and hepatitis C, as early detection and treatment can prevent severe complications.
Ultimately, protecting heart health is closely linked to preventing viral infections. Vaccines, hygiene practices, and regular screenings form an essential toolkit for reducing cardiovascular risk and maintaining long-term well-being. Prevention remains the most effective strategy against the hidden dangers that follow viral infections
