For active immunisation of maternally derived antibody positive or negative calves from 9 days of age against BRSV and PI3V, to reduce the mean titre and duration of excretion of both viruses.
Onset of immunity: 5 days for BRSV and 10 days for PI3V after a single vaccination.
Duration of protective immunity: 12 weeks following a single dose. The duration of protective immunity against the PI3V fraction may be reduced in MDA positive calves vaccinated before 3 weeks of age.