بسم الله الرحمن الرحيم
After each salah and at the time of going to bed, read انا لله وانا اليه راجعون eleven times with durood 11-11 times before and after, and keep supplicating for wellbeing and recovery.
Allah knows Best!
Darul Uloom Deoband
This answer was collected from the official ifta website of Darul Uloom Deoband in India.