In April, 2013, the first highly virulent PEDV infections emerged in swine farms in the US (Stevenson et al., 2013) . By March 12, 2015, PEDV had spread to 36 US states, including the geographically separated state of Hawaii, and one US territory, Puerto Rico (https://www.aasv.org/Resources/PEDv/PEDvWhatsNew.php).