To Public Health RNs-- I Need Advice on How to get into Public Health

I graduated from nursing school with my BSN in Dec 06. I got a job on a med-surg floor in my hometown. Before I graduated I did a rotation in Public Health and I loved it. I was told to at least get a year experience on med-surg. Well, now it has been 2 1/2 years! (Time flies!) I don't mind hospital nursing, but I know my heart is in public health.

I have tried twice to get a job as a County Public Health Nurse. I have gotten interviews and have been rejected. The first time I heard they hired someone who already had public health experience.

I need some advice. What do i need to do to get into public health?

All advice is welcome!

Thank you