<p>I think, given the advice, my true interests lie in the MPH/PhD field. Just a brief outline: I will double major in Economics and Applied Math. From then on, I will go on to get my MPH. After that, I get my PhD in epidemiology (@Lergnom). </p>
<p>@WOWM Thanks for the detailed reply. MD looks improbable. I tried to plan out my roadmap, and was only able to plan out my BA Applied Math courses. It just got quite confusing after that. The biology, economics, and math classes clutter my “roadmap” - not to mention the humanities courses I haven’t yet included. I can see it is do-able, however - I have to take 12 MTH/STT classes and I have eight semesters. I don’t know which ones are practical to “double-up.” Sorry 
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<p>@Chedva Yes - I want to to lab research with viruses. Does my double-major plan suit such a career goal? (the MPH-PhD route)</p>
<p>@PinotNoir As a double major, will I have the time to do two different research/internships with the two different department? Should I keep economics? I think, in theory, economics would be good to have because it helps with the economical aspect of health administration. It just is a matter of a cluttered schedule. Any advice? </p>
<p>This is SO confusing and baffling. Sorry, in advance.</p>