Since this epidemic has caused delays and postponded many of the exams so we actually cannot predict what will be going to happen.
If there will be any change in exams dates then it will be notified on the official website.
So I would recommend you to keep a check on the website for the latest updates.
Hope it helps.
AIIMS exam is in July and the qurantine periods is till 15th of April and there is no news of increasing of this qurantine period , so there is no chance of postponed of AIIM July session exam.