The unmasking of haemagglutinin in extracts of vaccinia-infected calf tissue.
D000818:Animals; D000941:Antigens; D001717:Birds; D002417:Cattle; D046508:Culture Techniques; D006386:Hemagglutination Tests; D006389:Hemagglutinins, Viral; D012867:Skin; D014465:Ultrasonics; D014616:Vaccinia virus / Q000276:immunology*
D000941:Antigens; D006389:Hemagglutinins, Viral