title: Haemagglutinating activity of variola virus.
mesh_terms: D000818:Animals; D002645:Chickens; D004372:Ducks; D004912:Erythrocytes; D005777:Geese; D000882:Haplorhini; D006385:Hemagglutination Inhibition Tests; D006386:Hemagglutination Tests; D014422:Turkeys; D014616:Vaccinia virus / Q000276:immunology; D012901:Variola virus / Q000276:immunology*