It was sparked by an H2N2 strain and was first identified in China.
这是一种H2N2病毒引发的，并在我国首次发现。
But because H3N2 completely replaces H2N2 in people, no one born since 1968 has any immunity to H2.
但因为H3N2在人体完全取代H2N2所以在1968年之后出生的人没有一个人对H2有任何免疫性。
The virus is produced by a reassortment, in which human-adapted H1N1 swaps genes with an H2N2 bird flu.
这病毒是重组产生的，由人-适应H1N1与H2N2禽流感基因互换。
An H2N2 virus causes the "Asian" flu pandemic, completely displacing the H1N1 viruses that have been circulating in humans since 1918.
H2N2病毒引起“亚洲”流感大流行，完全替换了自1918年以来在人间的传播h1n 1病毒。
The virus only differs from H2N2 in one of its surface proteins, the h; since many people still have antibodies to the unchanged N2 protein, its effects are less severe.
病毒唯一的差别是在H2N2在它的表面蛋白之一，H，因为很多人一直有对未改变N2蛋白有抗体，它的影响没多严重。
The virus only differs from H2N2 in one of its surface proteins, the h; since many people still have antibodies to the unchanged N2 protein, its effects are less severe.
病毒唯一的差别是在H2N2在它的表面蛋白之一，H，因为很多人一直有对未改变N2蛋白有抗体，它的影响没多严重。
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