Hodgkins

Hi, I am a caregiver for 20F with HD stage IIB having ABVD 2 cycles over.
Started with extensive mediastinal lymphodenapathy and itching for almost 5 months before diagnosis.
The WBC count started with 19000 and has been 5700-5000 (Neut - 50-58%) on each test 1 day before next chemo. HBG increased from 10.3 to 12 in the last test.
Is this normal ? I understand the WBC is likely to drop further. Itching subsided completely, but recurred mild after 3rd dose and subsided again.
Is the response positive?
Since WBC stays normal at least when it is tested, is the risk of contracting infection as much as for a normal healthy individual?
What steps can be taken to minimize Bleomycin long term effects - though I dont know much about the effects.
Thanks for reading