Barry uses repetition to emphasize the importance of proficiency needed to successfully be a scientist during the flu epidemic. For example, in the second paragraph, Barry repeats the term courage to declare that in order to be a scientist, one must “accept—indeed, embrace—uncertainty” (Barry), signifying the unknown dangers that arise with the profession. He elaborates that one must have courage to perform in the laboratory with the uncertainty of aspects of science unknown to man. Barry explicates that scientists must embrace uncertainty because “’science teaches us to doubt’” (Barry). Without the acceptance and certainty of uncertainty, it will create fear and tentativeness within the scientist, and we will not progress as a society nor