A study has found that flu vaccination lowers the risk of stroke. The risk of stroke was reduced by about 23% 6 months after vaccination, regardless of the patient’s age, gender, or health status.
The results of a study on the correlation between flu vaccination and stroke conducted by Dr. Jessalyn K Holodinsky of the Hotchkiss Brain Institute, University of Calgary, Canada, were published in the international journal The Lancet on the 1st (doi.org/10.1016/S2468-2667). (22)00222-5).
Respiratory infections can be precursors to stroke and myocardial infarction. Previous studies have reported that flu vaccination is associated with a reduction in the risk of myocardial infarction and hospitalization for heart disease.
In fact, some societies recommend flu vaccination for patients with heart disease, but it is unclear whether vaccination shows the same protective effect against stroke and whether variables such as age and gender show consistent trends.
The researchers analyzed the data with the goal of assessing stroke risk after flu vaccination in adults.
4,141,209 adults from Alberta health care data from September 30, 2009 to December 31, 2018 were compared for stroke events, including acute ischemic stroke, cerebral hemorrhage, subarachnoid hemorrhage, and transient ischemic attack.
During the period, 1,169,565 individuals (42.7%) were vaccinated at least once, and the number of strokes was 38.
After adjusting for variables such as demographics and complication rates, flu vaccination significantly reduced the risk of stroke (HR 0.78).
This trend was found across all types of stroke, including acute ischemic stroke and cerebral hemorrhage, and overall stroke risk reduction was confirmed in all age groups except for those without hypertension.
“Those who have recently been vaccinated against the flu have a reduced risk of stroke compared to those who have not,” the researchers said. “The association is not limited to individuals at high baseline stroke risk, but across the population.”
“This study demonstrates an indirect benefit of flu vaccination in reducing the risk of stroke,” he said. do,” he added.