If you have received an acceptance offer, then please respond to the offer as soon as you can!
Being on the waiting list, waiting anxiously for other people to respond to their acceptance offers, is the most nerve-wracking, disappointing, and frustrating thing I have ever experienced. I turned down offers back in early February in order to allow for other applicants to have a chance to receive an acceptance offer early in the process, so please please please do the same!!
Because I am waiting to hear from Hopkins MMI, other anxious applicants are waiting for me to turn down my other offer as well.