Prevent has been around for a long time: its first version, running on DOS, dates back to 1987. Since then many
things have changed and have been added, but the basic idea has remained the same.
Prevent models multiple risk factors and the relationships they have with multiple diseases. Users can specify
risk factor interventions, and Prevent will then produce two projections: one with trends in disease incidence and risk factor prevalence, and one with these same trends plus the intervention. The
difference between the two then can be attributed to the intervention.
In addition to its role as a research tool, Prevent also is a great tool for teaching. Its seamless integration of
epidemiology and demography allows to illustrate the complex effects that result from their interplay. Extensive graphical output, including many dynamic graphs that show developments over time, lets
students explore these effects interactively.