Viral infections in the embryo.
D000818:Animals; D004622:Embryo, Mammalian; D004625:Embryo, Nonmammalian; D007106:Immune Sera / Q000494:pharmacology*; D009975:Orthomyxoviridae; D014777:Virus Diseases
D007106:Immune Sera
EMBRYO; IMMUNE SERUMS/effects; INFLUENZA VIRUSES