(A) Examples for three negative blood donors. These are either non-reactive samples or samples that show cross-reactivity with isolated GP46 confirmatory and/or GP46-II typing antigens. (B) Examples for three HTLV-1 patients. Different profiles were observed depending on the individual immune response of each patient. (C) Examples for three HTLV-2 patients. Different profiles were observed depending on the individual immune response of each patient.</p