Generation and evaluation of a Newcastle disease virus-based H9 avian influenza live vaccine.


Infection with H9 avian influenza virus (AIV) and Newcastle disease virus (NDV) are two important causes of egg drop in layer and breeder poultry, leading to severe economic loss in the industry. Currently in China, inactivated H9 AIV vaccine and live attenuated NDV vaccine have to be repeatedly administered to prevent egg drop in layer animals. Using… (More)


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