COMPOSITION: VIRUS OF THE AVIAN VIRAL ARTHRITIS, STRAIN WVU 2937,;PROPAGATED INTO CHICKEN EMBRYO, INACTIVATED BY THE COMBINED ACTION;OF BETA-PROPIOLACTONE AND HEAT AND THEN EMULSIFIED WITH A SELECTED;MINERAL OIL.;EACH DOSE (0.5 ML) CONTAINS:;AT LEAST 10^7 TCID/50 OF INACTIVATED AVIAN VIRUS ARTHRITIS 0.1ML;MINERAL OIL (LIQUID PARAFFIN-MARCOL 52) 0.35 ML;MANNIDE MONO-OLEATE (AS EMULSIFFIER) 0.05 ML;THIOMERSAL (SODIUM ETHYLMERCURITHIOSALICILATE) 0.05 MG