Hi Shravan,
Unfortunately this is a question that is impossible to give a specific answer to. Low white blood cells can be due to many things, including infection, cancer, lupus, and different medications. The treatment is dependent on what is causing the decreased blood count, so it should be followed up with a doctor to follow this up. There is no specific diet that will increase the white blood cells, but havy a healthy diet will always help with general health.
Good luck,
JMK MD
There are many reasons that cause to the deficiency of white blood cells, and the treatment depends upon the mode of deficiency. Any how it is better to have a check up and have regular medication.