THE VACCINE COTNAINS THE HITCHNER B1-STRAIN OF NEWCASTLE;DISEASE VIRUS IN LIVE, FREEZE-DRIED FORM. THE EMBRYONATED;CHICKEN EGGS USED IN THE PRODUCTION OF THE VACCINE ARE OBTAINED;FROM SPECIFIC-PATHOGEN-FREE (SPF) FLOCKS.;ONE DOSE CONTAINS:;NEWCASTLE DISEASE VIRUS (NDV) STRAIN B1....AT LEAST 10^5.5 EID50