Figure 3.

IFN-α levels in sera after vaccination during 21 days. The IFN-α levels were determined at different time points after vaccination with a single dose of the Thiverval-strain vaccine. Asterisk symbol (*) refers to 4 dpv for groups A and B, and 5 dpv for groups C and D. Letters above the symbols are used to represent statistically significant differences between the groups on that day: similar letters indicate no statistical difference and different letters show statistical difference (p < 0.05).