Potency and magnitude of intra- and intertype NAc in HIV-1, HIV-2, and HIV-D plasma. (A) Mean potency scores of intra- and intertype NAcs of HIV-1 (n = 20), HIV-2 (n = 20), and HIV-D (n = 11) plasma tested against five HIV-1 and five HIV-2 isolates. (B and C) Mean magnitudes of intra- and intertype NAc in plasma against the individual isolates. The diameters of the illustrated circles correspond to the potency/magnitude scores of plasma NAc, where scores of 1, 3.1, 5.2, and 7.3 correspond to reciprocal titers of 102, 103, 104, and 105, respectively.*, P < 0.05; **, P < 0.01; ***, P < 0.001.