A field trial of preshipment vaccination of calves

animal diseases calves enfermedades de los animales enfermedades respiratorias haemophilus somnus ibr ipv virus immunisation immunization maladie des animaux maladie respiratoire paramyxoviridae pasteurella pasteurella haemolytica pasteurella multocida respiratory diseases stress ternero transport transporte vaccin vaccines vacuna veau virus ibr ipv