Propagation of the PR8 strain of influenza A virus in chick embryos. IV. Studies on the factors involved in the formation of incomplete virus upon serial passage of undiluted virus.
D000818:Animals; D002642:Chick Embryo; D003673:Defective Viruses; D009980:Influenza A virus; D009975:Orthomyxoviridae; D012098:Reproduction; D012692:Serial Passage; D014780:Viruses
INFLUENZA VIRUS