RBD-Fd protein  Binds to DPP4 receptor and MERS-CoV RBD-specific neutralizing mAbs (Mersmab1, m336, m337, and m338)  MF59; Alum  I.M. or S.C.  BALB/c mice; hDPP4-Tg mice  Elicits MERS-CoV S1-specific Abs (IgG (> 1:105), IgG1, and IgG2a) in mice, neutralizing at least 9 pseudotyped (> 1:104) and live (> 1:103) MERS-CoV (EMC2012 strain)  N/A  Protects majority (5/6) of vaccinated hDPP4-Tg mice from challenge of MERS-CoV (EMC2012 strain, 104 TCID50)  Tai et al., 2016