That's the real problem with chemically designed drugs. However, there is still a choice which is the use of biological agents which will evolve faster than the disease (in fact looking for a predator of the disease). In this regard, growing efforts are directed to the use of bacteriphages (virus than kill bacteria)as a therapeutic agent. For a review see Merril et al. (2003)Nat. Rev Drug Discov. 2:489-487
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That's the real problem with chemically designed drugs. However, there is still a choice which is the use of biological agents which will evolve faster than the disease (in fact looking for a predator of the disease). In this regard, growing efforts are directed to the use of bacteriphages (virus than kill bacteria)as a therapeutic agent. For a review see Merril et al. (2003)Nat. Rev Drug Discov. 2:489-487