title: Aspects of virulence in ferrets exhibited by influenza virus recombinants of known genetic constitution.
mesh_terms: D000818:Animals; D002335:Carnivora / Q000382:microbiology*; D005289:Ferrets / Q000382:microbiology*; D005814:Genes, Viral; D009975:Orthomyxoviridae / Q000235:genetics / Q000472:pathogenicity*; D011995:Recombination, Genetic; D014774:Virulence