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A novel recombinant attenuated Newcastle disease virus expressing H9 subtype hemagglutinin protected chickens from challenge by genotype VII virulent Newcastle disease virus and H9N2 avian influenza virus

Viral EvolutionPoultry DiseaseViral PathogenesisImmunologyVirologyNovel RecombinantH9 Subtype HemagglutininMedicineViral GeneticsNewcastle Disease VirusPoultry Science