soa: it's normal on interferon that WBC will be around 1000-1500. Doctors start to worry when it's below 1000.
You may try BCAA, branched amino acids.
you don have to look at WBC to know how your immune system is, quality of immune system responses are not directly correlated to these numbers.you may look at nagalase
if you are under peginterferon feeling flu like effects is normal, that s the effect of activated immune system and inflammation but we cannot say if immune system will win
we do know that taking 10.000iu of vit d3 daily keep immune system balanced and that low vit d makes pegintf poor or non response, so check vitd25oh and intact pth while you take daily vit d3