An illustration of the binding affinities of antibodies with SARS-CoV and SARS-CoV-2 RBDs. The molecular names of these antibodies are 80R (PDB 2GHW), ACE2 (3D0G), VHH-72 (6WAQ), m396 (2DD8), S230 (6NB6), and F26G19 (3BGF). Abbreviations: ACE2, angiotensin-converting enzyme 2; RBD, receptor-binding domain; SARS-CoV, severe acute respiratory syndrome coronavirus.