Cvid treated with ig-infusions. last bloods shows very low b cell count. any interpretation?

CVID: Is an arbitrary or a default diagnosis, no body knows what is really going on except that B cells are present, but not functional, as opposed to Bruton's agammaglobulinemia, which is diagnosed in infants, both receive IVIG for life.At any rate, derangements of lymphocyte reading would happen, for a reason or another, possibly drug induced, might correct itself, just keep your regimen and follow up