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. 2020 Sep 17;8(9):1427. doi: 10.3390/microorganisms8091427

Figure 6.

Figure 6

Humoral immunity in vaccinated and challenged calf groups. Commercial ELISA were used to analyze antibody levels in serum samples collected on monthly basis. Error bars represent the standard deviation of the average for each animal group for one month before challenge and 12 months post challenge; * p < 0.05 compared to the PBS group.