Influenza-like illnesses, heart attacks and strokes have approximately the same seasonality – they are more likely to get sick during the winter months. It is known that these cardiovascular disasters are more frequent after the flu. Influenza vaccination is considered a factor that can potentially protect against them. New research by American scientists.
In a new study, published at Journal of the American Heart AssociationThe researchers analyzed the link between the effectiveness of the seasonal flu vaccine and the risk of heart attack and stroke.
Scientists from the State University of New York processed data on people who were hospitalized from 2014 to 2015 in the United States with heart attacks, strokes and flu-like illnesses.
According to new data, people are more likely to develop heart attacks within seven days of the onset of flu-like illness. Stroke is characterized by a delay in time: it usually occurs after 7-15 days, but the increased risk persists for a month.
The scientists had no data on whether the study participants were vaccinated against influenza. They focused on the effectiveness of the flu vaccine in each monitored season. It is well known that the effectiveness of this vaccine varies from year to year.
It turned out that in the years when the vaccine was more effective, the number of people with flu-like symptoms who developed a heart attack or stroke was lower. Previous studies have shown that people who neglect the flu vaccine have a six-fold higher risk of heart attack per year.
Scientists speculate that influenza vaccination may play a role in the prevention of heart attacks and strokes. They point out that this issue is not yet closed, it needs to be studied better.