New research from the Women’s College Hospital in Toronto found that the flu vaccine may also reduce the risk of heart attack. Conducting a research review of 6 different vaccination clinical trials, researchers found that those patients who had already had a heart attack event before, had 55% lower risk of having a severe cardiac event. Vaccinated patients were also found to be less likely to have a fatal event. Also stronger vaccines had more cardiac benefit than the typical seasonal vaccine. Heart disease is the leading cause of death among women in North America and researchers say that these findings “are all the ammunition [they] need to move forward” in their research.