Jesse Waggoner wasn’t aiming for a national award when he began researching the behavior of a Union physician during the Civil War. But he can’t help but smile now that he has a gold medal in his hand.Waggoner, who graduated from the Duke University School of Medicine last week, received the Osler Medal from the American Association for the History of Medicine for his as-yet unpublished paper on Eugene Sanger, a surgeon in the Union...