4)
4). However, all five monoclonal antibodies (mAb) did not neutralize the pseudotyped V534A mutation. Additionally, one mAb RBD-14F8 did not show neutralizing activity against pseudoviruses with amino acid substitution of L506?F or D509?G (England1 strain, EMC/2012 L506?F, and EMC/2012 D509?G), and RBD-43E4 mAb could not neutralize the pseudotyped I529?T mutation, while three other neutralizing mAbs…