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Lethality of the G2 and G3 viruses in SPF chickens. The G2 infected chickens were inoculated intranasally with 100μl 103EID50 G2 viruses and the G2 contact chickens were housed with them without inoculate. The G3 infected chickens were inoculated intranasally with 100 ul 103EID50 G3 viruses and the G3 contact chickens were housed with them without inoculate.
