if your future company will accept you on your situation,they can provide waiver to u that at any cause of your done treatment they will not be responsible to u,if u still continue your application and u already here and undergo qatar medical and treated u the same there is a risk that they will send u back to your origin,and also,it can be happen that they will not continue on your application,sometimes its management discretion. i know that qatar is strict when it comes to health.