No sign of MERS-CoV antibody was found among 2400 sera from patients visiting the Dr. Soliman Fakeeh Hospital in Jeddah, KSA from 2010 through 2012 , and no sign of prior MERS-CoV infection was found among 130 healthy blood donors screened at King Abdulaziz University Hospital in Jeddah (collected between January and December 2012).