Serena Williams and Pulmonary Embolism—Who's at Risk?

Serena Williams is recuperating at home under medical
supervision from a health scare she described as “extremely hard, scary and
disappointing” in a statement issued March 2. The tennis ace and 13-time Grand Slam champion underwent
emergency treatment for a hematoma brought on by a pulmonary embolism (a blood
clot in the lungs). Here’s a guide to this dangerous and surprisingly common condition—I’ve
had it twice.