Which major should I pick for medical school?

I am currently a freshmen at a community college and I am going to transfer over to UCF when my 2 years is over. Currently I am pre-majoring in radiologic science. I don't know if i should continue to major in that when i go to UCF or should i switch over to microbiology? Which is a better major to be able to get into medical school, or will prepare me better for med school?