In Asia, PEDV has been reported in Shanghai, China since 1973 (Sun et al., 2015a) . However, not until 1984 were the causative agents, PEDV H, CH and J strains, especially the J strain, isolated in primary fetal pig intestinal cell cultures and confirmed to be PEDV by immunofluorescence assay (IFA), two-way cross virus neutralization (VN), and in vivo pig cross-protection assays comparing tissue culture-adapted (TC) PEDV and TGEV, and their respective antisera (Xuan et al., 1984) . However, the sequence information for the early PEDV strains (H, CH, and J) is unavailable (personal communication with Drs.