Figure 3.
Growth kinetics of SARS-CoV-2 in hESCd trophoblasts. At day 4, ESCu and ESCd were infected with SARS-CoV-2 at a multiplicity of infection of 0.5. The viral titers depicted are presented as means ± SDs (n = 3). The asterisks represent a statistically significant difference between groups (*P < .05; **P < .001, unpaired t test). Abbreviations: ESCd, embryonic stem cell derived; ESCu, embryonic stem cell undifferentiated; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2; TCID50, 50% tissue culture infective dose.