A new study has found another possible benefit from the flu shot – protection against atrial fibrillation (irregular heart beat), which is a risk factor for stroke. The study included 57,000 people from Taiwan. The researchers found a significant link between the flu shot and new cases of atrial fibrillation, compared to those who did not receive the flu shot. Atrial fibrillation is associated with a five times greater risk of stroke.

Individuals who did not receive the flu shot and developed the flu were 18 times more likely to develop atrial fibrillation, compared to those who did not get vaccinated. Furthermore, the association was still seen among different groups of people.

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