Real life stories can be an extremely compelling way to convey a message. People tend to identify with the person telling the story because they are real and not an actor telling a story.
This story about Charlene shows how a simple test potentially saved her from a more serious outcome. The fact that she was willing to share her story beyond the walls of her workplace enabled her real story to maybe be heard by another who decided they should take the test as well.
Here I Write 