The final form of the virus, biomedical researchers fear, will be a highly pathogenic strain of influenza that spreads easily among humans.
生物医学研究者担心，禽流感病毒将变异为这种流感高致病菌株的形式在人类之间广泛传播。
The strain currently causing most concern is H5N1, which has become a 'highly pathogenic' virus that is capable of killing domestic poultry, wild birds, and humans and other mammals.
目前造成家禽、野禽、人类及其他动物死亡的禽流感病毒通常是H5N1的变异株。
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