After preliminary investigations, it was concluded this month that the cause is not seasonal influenza but rather an entirely new hybrid strain composed of pig, bird and human viruses.
初步调研后的结论表示,这些病症并非季节性流感所致,而是因为一种由猪、鸟、人类病毒组成的全新杂交病毒链。
The two strains whose genes are found in the hybrid belong to influenza families known generally as North American and Eurasian pig flu.
在加利福尼亚病毒样本中发现的两种菌株的基因很常见,属于北美和欧亚猪流感株。
These new genes provided replication advantages that allowed the hybrid to permeate densely packed pig farms whose inhabitants were routinely shipped across the United States.
这些新基因提供了复制的优势,使这种混合病毒弥漫散布在密集挤满猪的养猪场,养猪场饲养的猪例行被运往美国各地。
These new genes provided replication advantages that allowed the hybrid to permeate densely packed pig farms whose inhabitants were routinely shipped across the United States.
这些新基因提供了复制的优势,使这种混合病毒弥漫散布在密集挤满猪的养猪场,养猪场饲养的猪例行被运往美国各地。
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