My Grandson Is 1 And Just Finished His 2nd Round

My grandson is 1 and just finished his 2nd round of IVIG. It has been three weeks since his last and he is steadily going down in his counts, now at 40,000. 1 week from now the doctor says if he is below 20,000 he will fave a round of IVIG or begin steroids. At his last two treatments he was at 1,000 and 14,000. Do you have a preference on these treatments?