I'm starting an MPH program this fall with a focus on Infectious Disease Management, Interventions, and Community Practice. After completion of that program, I plan to pursue a PhD or DrPH in Epidemiology with a concentration on Infectious Diseases. During my MPH program I am choosing all epidemiology courses for my 3 elective options (in addition to the the required epi course that all MPH students are required to take).
My advise would be take as many epi courses that you can fit into your schedule while studying health promotion/community health.... try your best to intertwine the two, rather that be through experience or courses.
Good luck!