I was not interviewed. I also reached out to the same person several times with other questions/updates etc and never got a response until he notified me they I was the first on the waitlist and had a “very good chance at getting in”. Then I was notified of my acceptance on 3/14. I was very worried as it was my top choice. So not trying to get your hopes up, but I only got responses when there was some good news haha. Best of luck, pulling for you!
I was unofficially accepted by the USC health Econ PhD program last Monday. I reached out a couple weeks before for the update and was told that I was first on their waitlist. You may be on a silent waitlist, but not sure.