I will be applying to Immunology and Microbiology PhD programs. I have taken classes in these areas but my research is in physiology. Its a related area and basic research. I have several publication in this lab, have been there for 2.5 years, and have a given many presentations.
Does it make me less competitive for my program since my undergrad research is in a slightly different field? If so, how much of a concern is this and would I be better off to do a post bac in a more related field before applying for my PhD.