F (t)=E0 (0) ??For any single epitope, the probability of it fusing with the target cell it is bound to before it is disabled by a bound antibody is equal to f (?). The probability of this fusion being prevented by an antibody is pb 1{f (?) ??The probability pb of disabling a gp41 trimer in the pre-hairpin intermediate may depend on both A, the mAb concentration and on N, the number of gp41 trime