Additionally, 10C10 and 5C3 inhibited infection of TB40/E, VHL/E and TR with IC50 values from 0.11 to 1.35 μg ml−1 (Fig. 4c, top 2 rows and Supplementary Table 2) and Cytogam exhibited variable neutralizing capacity with IC50 values of >6 μg ml−1 for TB40/E and VHL/E infection, and 1.58 μg ml−1 for the clinical strain TR (Fig. 4c bottom row and Supplementary Table 2). This evidence concerns the gene VHL and infection.