title: Hemagglutination activity and morphology of influenza virus.
mesh_terms: D000818:Animals; D002642:Chick Embryo; D002850:Chromatography, Gel; D046508:Culture Techniques; D004912:Erythrocytes; D006168:Guinea Pigs; D006386:Hemagglutination Tests; D006387:Hemagglutination, Viral; D008168:Lung; D051379:Mice; D008854:Microscopy, Electron; D009975:Orthomyxoviridae / Q000472:pathogenicity*; D009976:Orthomyxoviridae Infections; D014774:Virulence; D014776:Virus Cultivation