Of all cancer patients, teenagers are the least likely to consistently follow their care plans, which could partly explain why survival gains for young adults have lagged behind those of other age groups, experts say. But a video game, called Re-Mission, teaches them about the importance of following their care plans. Re-Mission follows the efforts of a microscopic "nanobot" as she tries to annihilate cancer cells. Players win by taking care of their health: swallowing oral chemotherapies, taking stool softeners to prevent bowel perforations, and practicing good oral hygiene to prevent mouth sores.