The present invention relates to pharmaceutical compositions comprising an immunizing amount of inactivated Newcastle disease and an adjuvant for use in the protection of poultry against Newcastle disease, to the use of an immunogenic amount of an inactivated Newcastle disease virus and an adjuvant for the manufacture of a booster vaccine for the vaccination of a chicken or turkey, and to a kit-of-parts comprises a container comprising an inactivated Newcastle disease virus and an adjuvant for a priming vaccination of a chicken or turkey and a container comprising an inactivated Newcastle disease virus and an adjuvant for a boosting vaccination of a chicken or turkey.
