Buddy, don't let the count dip below 70. Arrange for blood donors and insist on transfusion as soon as it nears this level. At the same time, remember that transfusion is not without its complications. He would be very weak and would have lost all appetite, but ensure that he eats well.
I will send you a quotation from my favorite poet to sustain you spiritually through these difficult times..... More things are wrought by prayer than this world dreams of. by Alfred, Lord Tennyson.
May God be with you.