are diseases best studied through pathobiology or virology/immunology perspective?

[smarty7]

I'm interested in applying to PhD programs relating to microbiology, immunology, and/or biomedical sciences due to my interest in host-pathogen interactions (more specifically from the infectious virus/bacteria perspective than the host's immune response). I've only just learned about pathobiology and how that degree and training is also related. I guess I'm not sure if I should stick with a Micro route or a pathobiology route? Does this even matter if the faculty overlap departments?