Fig. 4. The HI antibody titer in response to the Pasteurellosis vaccine in experimental animals immunized with the Pasteurellosis vaccine alone, Pasteurellosis and PPR, Pasteurellosis and CCPP, Pasteurellosis and SPGX, or all four vaccines simultaneously. A greater antibody response was observed in animals vaccinated with four vaccines simultaneously and in a group vaccine with a combination of Pasteurellosis and CCPP, which remained higher after day 35 of vaccination.