(a) Fold change of viral genes (related to mock-infected samples and normalised against housekeeping gene RS17) following viral infection of cESC with FP9, CNPV, MVA, and PBG98 (MOI: 5, 16 h p.i.). Data were calculated with qRT-PCR and are representative from three independent experiments. (b) Viral titres recovered from cESC and DF-1 after infection with the viruses (MOI: 0.1, 96 h p.i). Virus titres correspond to extracellular virus, determined by plaque assay on CEFs (Mean ± SD). Data are representative of two independent experiments. One-way ANOVA with a Bonferroni post hoc test was used to analyse the data. ns (not statistically significant): p > 0.05, ****: p < 0.0001.