Thank you, HappyGoat! It's not clear whether the DrPH program has rolling admissions or not. I'm an international student so may have been informed earlier due to all the preparation needed to be there before July.
I called Admissions and they told me they allowed 2 people to defer last year due to extenuating circumstances. Also, some people (like me) may choose not to go especially if the financial support is insufficient, so if you had an interview, it could be that you're wait listed ?!