Figure 3
Concentrations of cytokines in sera following the first swIAV infection. Individual concentrations and mean ± standard deviation of concentrations of IL-6 (A) and IFN-α (B) in sera collected at D0, D1 and D3 in the six groups. The detection limits were 4.3 pg/mL for IL-6 and 25.1 U/mL for IFN-α. Significant differences between groups are indicated by different letters. H1N1 and H1N1 VACC: groups challenged at D0 with the 272/20-H1avN1 strain (HA clade 1C.2.1). H1N2 and H1N2 VACC: groups challenged at D0 with the 154/20-H1avN2 strain (HA clade 1C.2.4).