Propagation of the PR8 strain of influenza A virus in chick embryos. II. The formation of incomplete virus following inoculation of large doses of seed virus.
D000818:Animals; D002642:Chick Embryo; D003673:Defective Viruses; D009980:Influenza A virus; D009975:Orthomyxoviridae; D012098:Reproduction; D014611:Vaccination; D014780:Viruses
INFLUENZA VIRUSES; VIRUSES