This is a virus of animal origin with a unique mix of genes from swine, bird, and human influenza viruses.
这是一种由猪流感、禽流感和人流感病毒基因独特组合形成的动物源病毒。
The swine-origin influenza A (H1N1) virus circulating in Mexico, the United States and Canada, and present in two dozen other countries, is a descendant of the Spanish flu H1N1 virus.
猪流感的病原甲型H1N1流感病毒现在正在墨西哥美国加拿大流行，在其他二十几个国家也有病例出现。
The swine-origin influenza A (H1N1) virus circulating in Mexico, the United States and Canada, and present in two dozen other countries, is a descendant of the Spanish flu H1N1 virus.
猪流感的病原甲型H1N1流感病毒现在正在墨西哥美国加拿大流行，在其他二十几个国家也有病例出现。
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