Thanks for your question on Health Care Magic. I can understand your concern. Leukemia patients are having lower immunity. And this is even lower I d patient is on chemotherapy drug like imitinib. Since chances of opportunistic infections are very high. GI (gastrointestinal) tract is common site for such infections because of poor food habits in this patients. So appropriate dietary habit is must for maintaining good immunity. 1. Give patient home made, freshly prepared food. 2. Avoid junk food, outside food and stale food. 3. Give patient high protein diet including milk, eggs etc. Protein supplements are also good. 4. Patient should take multivitamin and antioxidants tablet. This is to improve immunity. 5. Give patient fruit juices, vegetable salads etc. Hope I have solved your query. Wishing good health to your patient. Thanks.