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Effect of day of sampling relative to booster with Vista Once (Merck, Madison, NJ) on steer Bovine Viral Diarrhea Virus Type 1 (A) and 2 (B) antibody titers. Day P < 0.0001. Values with unlike superscripts differ (P ˂ 0.05) across sampling days. Data from blood samples taken prior to vaccination used as a covariate in analysis (day 0 antibody titers for type 1 = 0.58 and type 2 = 0.45).
