I just saw a post that you applied to the Environment Health/Health Security track.
JHU is the only program I applied to as well, so I understand how much it stings.
For what it's worth, I think that you are an excellent candidate and I wonder if you would be a better candidate for a different DrPH track.
I applied to the HPM Public Health Informatics track and from my interview, it seemed they were looking for someone with your kind of experience doing epi work in a hospital setting. I think it might be worth looking at the other tracks of the HPM concentration. Someone with your experience will be a better fit for the tracks in that concentration.
You actually have the experience I wish I had when applying this year. So, keep your chin up!!