Hey- I'm in my first year at Pitt and almost everyone I know in the MPH is straight out of undergrad. I think it's definitely more than possible. If you have a lot of experience from school stuff then that will be helpful as well.
I had a 3.9/4.0 GPA
GRE: 510V, 720M, don't remember writing but it was decent
I got accepted to Emory, University of Michigan, and Pitt