As a response to the influenza epidemic of 1918 author, John Barry writes, The Great Influenza,” about scientists and their methods of research. He examines what makes up a true scientist and in turn their research credible. In his essay Barry highlights the traits of a good scientist and cements his ideals through diction, a metaphor, and an example of a renowned scientist. The repetition of words is most prevalent in the first paragraph of Barry essay. He does this to instill these key features of the realm of science. Uncertainty begins two consecutive sentences, Barry uses uncertainty as a theme throughout the essay because he believes it is a conjoined with research and the scientific method. He also repeats the word courage numerous