Hello,
Although I am not the individual your question was directed at, I was also wait listed for Queen's and I found out on April 10th by email.
"Your application to the Master of Public Health program at Queen's University has been reviewed, and you have been placed on the program waiting list. Our first round of offers have been sent out and the response deadline for those offers is April 30. Beginning May 1, if necessary, a second round of offers will be made to those on our waiting list and offers will continue to be sent out until a full cohort has been formed. Please note that you will be notified whether your application has been successful or not. If you would like your name removed from the waiting list at any point, please let me know.
Best Regards,
Gerri Lyman"
Hope this helps.