title: Freeze-dried infectious bronchitis haemagglutinating antigen.
mesh_terms: D000956:Antigens, Viral; D003332:Coronaviridae / Q000276:immunology*; D005612:Freeze Drying; D006384:Hemagglutination; D001351:Infectious bronchitis virus / Q000276:immunology*
chemical_list: D000956:Antigens, Viral