Is there any confirmation of transmission between pigs and humans at this point?

目前病毒在猪与人之间传播是否得到了证实？

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Antigens are the features on the surface of the virus that pigs and humans develop antibodies against to fight the infection.

抗原是病毒的表面特征，猪和人体感染后均会产生抗体。

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A new strain of swine flu shows that the pandemic version has jumped from humans back to pigs, where it's evolving in new and unpredictable ways.

一个新菌株的猪流感病毒表示，流感流行的变种，若从人跳回到猪身上，就会以新的和不可预知的方式继续演变。

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Scientists have known for decades that organisms as diverse as insects, frogs, pigs and humans make natural protein-based antibiotics to ward off microbes.

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Swine flu is a contagious respiratory disease that affects pigs and can jump to humans.

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The new strain, called H1N1, emerged from pigs and jumped over to humans sometime in late 2008, and then swept through the human population starting in the spring of 2009.

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