The general epidemiologist: is there a place in today's epidemiology?

Epidemiology has changed remarkably during its growth in the past quarter century. One of those changes has been the ever-increasing specialization among its practitioners. In this commentary, the author explores the degree to which this phenomenon has shaped the field. A partial explanation for this trend is found in the decline in the availability of training funds not focused on specific disease areas. Although it appears likely that epidemiology can continue to flourish without general epidemiologists, the field will lose some of its ability to quickly respond to emerging public health challenges. The author considers steps necessary for the training and inclusion of general epidemiologists.