Adults hospitalized with acute respiratory syncytial virus (RSV) infection face a sharply increased risk of cardiorespiratory events such as heart attack or stroke in the following weeks. The study is a retrospective self-controlled analysis. According to a review of 155 scientific studies published in the Journal of the American Heart Association, viruses such as RSV increase the risk of heart attack and stroke. The risk of heart attack is 4 times higher and the risk of stroke is 5 times higher in the month after laboratory-confirmed influenza.[1] The American Heart Association reports that both acute and chronic viral infections are associated with both short- and long-term risk of cardiovascular disease.[1] Study highlights association of severe RSV infection with increased risk in adults.[1]