Research is clear on the benefits of exercise for certain types of pain, including for pain associated with cancer treatment. A running group is putting this into practice.  An update on mammal-to-mammal transmission of bird flu, and a check in with a major AIDS conference.  Also, do we need to reconsider regulations around cigarettes in the wake of a crackdown on vaping? And heart attacks in young women can have a major psychological impact — especially when the person had no known risk factors.