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Antibodies to BoHV-1 evaluated by ELISA in sera of cattle immunized with four commercial BoHV-1 vaccines. Group 1 = vaccine A; group 2 = vaccine B; group 3 = vaccine C; group 4 = vaccine D; and Control group (not vaccinated). Mean titers ± standard errors (SEM) are depicted. Letters (a, b and c) highlight significant differences (p < 0.05) between groups. A: Total IgG antibodies. B: IgG1 subclass antibodies. C: IgG2 subclass antibodies.
