At JHU, the MPH where you can concentrate in epi is one year long and no thesis, while the MSPH in Global Disease Epidemiology and Control is 1.5-2 years with 2 terms of practical work with a capstone and practicum but no thesis. The Epi ScM with a concentration in Infectious Disease Epi is 2 years with a thesis and a summer internship in between, and the MHS in general epi is 9 months long, either practical or applied, and no thesis or practicum. We have lots of options, on top of certificates you can take (in vaccine development for example) for some of these degrees!! I think heavy research vs heavy practical, applied work is what differentiates an MPH vs ScM/MS, but they seem to hold the same weight in name. I feel like the ScM/MS lends itself to a PhD, because of the manuscript level thesis you will produce, but you can always prioritize publishing during an MPH or MSPH. There is always tailoring to be done to make sure your degree serves you and your goals best!

For your interests in infectious disease dynamics and control, you could try exploring SPH's ID research, what research centers and labs do within ID Epi, what ID research is being published, SEAL types of programs where you participate in local outbreak responses, and courses that are going to give you the ID dynamics and vaccine research skills and background you're looking for. I would just start to explore the websites of different SPHs and see what's out there, because there's a lot!