It sounds like Harvard will be an excellent fit for you! I notice in a previous post you mention that you'd like a career in research. I suppose one can cast research as a type of public health practice, but community-oriented types of research (i.e. CBPR) is not what I mean when I refer to community-based practice. I mean the delivery of direct public health services and resources to communities. So, implementation of public programs and services, advocacy at the local and national level, evaluation of interventions, quality improvement, campaign management, etc. All of these things are, of course, are driven by the engine of research with helps us to identify best practices and to demonstrate successes or failures, in line with the research-to-action model. There is a whole world of work in public health that is not in research, and I wonder if Harvard is as able to equip individuals who want to work in that other world as they are able to equip researchers. My hunch is that at Harvard you can more or less do anything, if you put your mind to it, to perhaps it's just a matter of digging deeper into the curriculum to seek out the training and topics I presently feel are lacking.
