A study published in Frontiers in Veterinary Science reveals the presence of murine coronavirus—the murine hepatitis virus or M-CoV—in mice of the Canary archipelago (Spain) that could have reached the islands by maritime transport from the European continent. This is the first ecoepidemiological study to examine the presence of coronaviruses that circulate in mice and rats of the natural and urban environment of the islands of La Palma, El Hierro, Tenerife and Lanzarote.