RBD-293T protein  Binds to SARS-CoV RBD-specific mAbs (neutralizing 24H8, 31H12, 35B5, 33G4, 19B2; non-neutralizing 17H9)  SAS  S.C.  BALB/c mice  Elicits SARS-CoV RBD-specific Abs (IgG), neutralizing pseudotyped (1:6.9 × 105) and live (1:1.6 × 103) SARS-CoV (GZ50 strain)  N/A  Protects all vaccinated mice from challenge of SARS-CoV (GZ50 strain, 100 TCID50) with undetectable viral RNA and viral load in lungs  Du et al., 2009b