The body’s under a lot of stress during a bout of flu, doctors say. Inflammation is up and oxygen levels and blood pressure can drop. These changes can lead to an increased risk of forming blood clots in the vessels that serve the heart.

The body’s under a lot of stress during a bout of flu, doctors say. Inflammation is up and oxygen levels and blood pressure can drop. These changes can lead to an increased risk of forming blood clots in the vessels that serve the heart.