Personalized medicine … in its simplest form, involves the use of genetic information to predict which patients with a given condition (e.g., heart arrhythmia) will benefit from a particular drug treatment (e.g., beta blockers). More ambitiously, personalized medicine promises to inform people of their heightened vulnerability (or resistance) to specific environmental, dietary, therapeutic, and other factors early enough that they can adjust their exposure and risky behaviors accordingly.
Complications
[T]he path to personalized medicine will involve a phase in which large numbers of people are treated according to their group membership. Moreover, this phase may not be a passing one.
Intersecting Processes 