This year’s seasonal vaccine contains three influenza viruses — one A (H3N2) virus, one regular seasonal A (H1N1) virus unrelated to the swine flu strain and one B virus.
今年的季节流感疫苗含有三种流感病毒——一种甲型（H3N2）病毒，一种与猪流感毒株无关的常规季节性甲型（H1N1）病毒，以及一种乙型病毒。
The new virus contains genes from a seasonal human H1N1 flu strain and a flu virus common in swine and called H3N2. The new strand is not related to the current H1N1 pandemic influenza strain.
这种病毒由季节性h1n 1人流感病毒和H3N 2猪流感病毒混合而成，但与正在全球流行的甲型H1N 1流感病毒没有联系。
Over the years, different variations of swine flu viruses have emerged. At this time, there are four main influenza type A virus subtypes that have been isolated in pigs: H1N1, H1N2, H3N2, and H3N1.
随着时间的推移，也出现了猪流感病毒的多种变种：现在人们从猪身上分离出了4种主要的A型流感病毒亚型： H1N1， H1N2， H3N2， H3N1。
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