viruses Article Interferon Regulatory Factor 3-Mediated Signaling Limits Middle-East Respiratory Syndrome (MERS) Coronavirus Propagation in Cells from an Insectivorous Bat Arinjay Banerjee 1,† , Darryl Falzarano 1,2, Noreen Rapin 1, Jocelyne Lew 2 and Vikram Misra 1,* 1 Department of Veterinary Microbiology, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK S7N 5B4, Canada;