In Part 1 of this chapter, you learned that the WHO’s 2011 statement regarding antibiotic-resistant superbugs says that “the therapeutic arsenal is shrinking” and that “the speed with which these drugs are being lost far outpaces the development of replacement drugs.” With that in mind what does the organizations statement indicate about the ability of pathogenic organisms to evolve in response to antibiotic therapy? What does it reveal about the difficulty of developing effective ways to combat these superbugs?