@Lostnfound -- A little boy in our neighborhood was diagnosed with leukemia late last year and he's looking at three years of treatments. I'm not sure how much of it will be chemo, but I know a lot of it is. He's also scheduled for some radiation treatments.
I know in his case, at the 28-day mark, the doctors wanted him to be in remission, or very close. They said that would determine his prognosis, to a great extent.
It's awful when kids have to go through stuff like this.