The study presented at the ESC congress 2019 suggested that Influenza vaccination is associated with an eight per cent reduced risk of death during flu season among patients with high blood pressure. ” Given these results, I believe that all patients with high blood pressure should have an annual flu vaccination,” said Daniel Modin, author of the study. Modin added that “Vaccination is safe, cheap, readily available, and decreases influenza infection. On top of that, our study suggests that it could also protect against fatal heart attacks and strokes, and deaths from other causes”.
Danish nationwide healthcare registers were used to identify 608,452 patients aged 8 to 100 years with hypertension during nine consecutive influenza seasons(2007 to 2016). The researchers made detail and tracked down how many patients had received a flu vaccine prior to each season. They then followed patients over each season and tracked how many of them died. In particular, they recorded death from all causes, death from any cardiovascular cause, and death rom heart attack or stroke. Finally, they analysed the association between receiving a vaccine prior to flu season and the risk of death during flu season.
After analyzing the patient differences in a given influenza season, vaccination was associated with an 18 percent relative reduction in the risk of dying from all causes, a 16 percent relative reduction in the risk of dying from any cardiovascular cause, and a 10 percent relative reduction in the risk of dying from heart attack or stroke. Modin further said that “We show that influenza vaccination may improve cardiovascular outcomes in patients with hypertension. During the nine flu seasons we studied, vaccine coverage ranged from 26% to 36%, meaning that may patients with high blood pressure were not vaccinated”. How flu and cardiovascular disease might be connected? It is noted that when the influenza virus infects the body, it triggers a strong immune reaction and subsequent inflammation. These responses fight the infection and clear the virus from the body but may increase the risk of having a heart attack or stroke.