The neutralization efficiency of 2B10 and 2E4 scFvs was tested with a standard panel of pseudoviruses and primary isolates of tier 1, 2, and 3. The scFv monoclonals were tested at starting concentrations of 100 µg/ml with serial threefold dilutions. HepB scFv was taken as negative control for scFvs. MuLV virus was used as a negative control. Non-linear regression curve straight line was plotted using the method of least squares to determine the IC50 values. Here, in this table, IC50 < 1 μg/ml is highlighted in red, 1 < IC50 < 10 μg/ml is in yellow, 10 < IC50 < 50 μg/ml is in leaf green, 50 < IC50 < 100 μg/ml is in faded green and IC50 < 100 μg/ml is in white.