CHO-K1 (American Type Culture Collection [ATCC] CCL-61) cells and pgsA-745 (ATCC CRL-2242) cells, a derivative deficient in xylosyltransferase (UDP-D-xylose/serine-1,3-D-xylosyltransferase), referred to as CHO745 in this study, were maintained at 37 °C with 5% CO2 in Gibco F-12 Nutrient K (Kaighn’s Modification of Ham’s F-12) Medium (Thermo Fisher Scientific) supplemented with 10% HyClone Cosmic Calf Serum (Thermo Fisher Scientific) and 1× penicillin/streptomycin. The reverse genetics technique for the production of replication-competent, recombinant CedV was described previously (30 (link)). The rCedV antigenome plasmid was designed based on the sequence available in the GenBank (accession no. NC_025351.1).