In 2010, Shannon was a healthy, ambitious and energetic 28-year-old, working as a pharmacy technician and expecting her second child. On December 5, 2010, complications from pneumonia and sepsis caused the death of her unborn son, and put her in a coma. Three weeks later, she woke up and discovered that doctors would have to amputate all four of her limbs to save her life. E.R. physician Dr. Travis Stork explains how sepsis attacks the body, and why the condition was even more severe for Shannon.