How personalized medicine is transforming your health care

Twelve years after Teresa McKeown beat stage 3 breast cancer with a brutal regimen of chemotherapy and a double mastectomy, the disease returned, more aggressively than before. This time chemotherapy failed. Day after day, she sat in a chair in her living room, too sick to move. She kept four journals, one each for her husband and her three grown children, and mustered the strength to write her thoughts about a future she didn’t expect to share.