Micro/Immuno-biology

I’m looking at grad schools in microbiology/immunobiology, maybe epidemiology. I’m having a very difficult time narrowing it down. I’m a Jr double major (Biochem and Statistics) at a state school. GPA right now is 3.0, hopefully 3.3 by the time I graduate. How likely is it that I can get into a PhD program? I don’t really have any specific schools in mind. I’m worried my GPA is going to be too low (science GPA is also around a 3.1-3). I have done research since my first semester and may end up on 2 papers by the time I graduate (with 3-5 presentations of my own at my school’s various forums).

Thanks!