When I interviewed at Hopkins they told me that they had a really big class last year (18 kids) and that spots were going to be very tight. I also heard a rumor (can't back this up) that they were only inviting 30-35 kids to interview this year. My guess is that they are shooting for a small class this year and might be done. However, the associate director told me that they evaluate interviewees in two rounds - all those through December and all those after. So they might not have given out interviews for the second round yet. Best of luck!