A patient beginning treatment for a substance use disorder expresses the belief that a few weeks of intensive therapy should be enough to be completely 'cured.' Which of the following analogies would be most appropriate for a therapist to use to help the patient understand the long-term nature and primary goal of their treatment?

A friend argues that treating a substance use disorder should be like treating a bacterial infection: a short, intensive course of treatment should result in a complete cure. Which statement best analyzes the fundamental flaw in this comparison, based on the primary goal of modern treatment approaches?