Hotel is 24 hours. The conference tickets I believe are nonrefundable but I bet the AHA would have some sort of waiting list, especially the way this one is selling.
We'll extend refunds at least through March 31. We do have a wait list started and will do what we can to accommodate as many on the list as possible. We certainly would rather accommodate someone from the wait list who wants to go to the conference than not refund someone who can't go. I do think we will be able to get a number of people on the wait list into the conference, but probably not everyone.
Anyone needing a refund can contact Events Registrar Chris Williams at firstname.lastname@example.org/888-822-6273 x 125.