The correct answer is telling a brief related story.
The writer engages readers by introducing the case of Emile, a two-year-old boy who is believed to be patient zero in the Ebola outbreak. By providing a specific narrative about Emile's illness and the subsequent deaths in his family, the writer creates a poignant story that draws readers' attention. This storytelling technique makes the information more relatable and impactful, allowing readers to grasp the seriousness of the Ebola outbreak through a personal and emotional lens.