THE PRESENT INVENTION RELATES TO A RECOMBINANT VECTOR FOR TRANSCRIPTION OF THE NEWCASTLE DISEASE VIRUS (NDV) GENOME, A STRAIN OF ATTENUATED RECOMBINANT NDV WITH A SURFACE ANTIGEN OF PATHOGENIC NDV PREPARED BY THE VECTOR, A METHOD OF PREPARING A RECOMBINANT NDV HAVING LOW PATHOGENICITY AND HIGH PROTECTIVITY EFFICIENCY AGAINST NEWCASTLE DISEASE (ND) USING THE VECTOR, AND A VACCINE AGAINST ND CONTAINING THE RECOMBINANT NDV. FIG. 1