viruses Article Efficacy of an Adjuvanted Middle East Respiratory Syndrome Coronavirus Spike Protein Vaccine in Dromedary Camels and Alpacas Danielle R. Adney 1, Lingshu Wang 2, Neeltje van Doremalen 3 , Wei Shi 2 , Yi Zhang 2 , Wing-Pui Kong 2, Megan R. Miller 3, Trenton Bushmaker 3, Dana Scott 3, Emmie de Wit 3 , Kayvon Modjarrad 4, Nikolai Petrovsky 5 , Barney S. Graham 2, Richard A. Bowen 1,*,† and Vincent J. Munster 1,3,*,† 1 Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, CO 80521, USA;