Fig. 6From: Single-domain antibodies against SARS-CoV-2 RBD from a two-stage phage screening of universal and focused synthetic librariessdAb39 competes with ACE2 for RBD binding and neutralizes SARS-CoV-2 pseudoviruses. The statistical difference was measured by paired two-sided Student’s t-test (*, P < 0.05; **, P < 0.01)Back to article page