有三种类型的季节性流感——甲型、乙型和丙型。根据病毒表面蛋白不同的种类和结合情况，甲型流感病毒又进一步分类为亚型。

There are three types of seasonal influenza – A, B and C. Type A influenza viruses are further typed into subtypes according to different kinds and combinations of virus surface proteins.

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有三种类型的季节性流感——甲型、乙型和丙型。根据病毒表面蛋白不同的种类和结合情况，甲型流感病毒又进一步分类为亚型。

There are three types of seasonal influenza – A, B and C. Type A influenza viruses are further typed into subtypes according to different kinds and combinations of virus surface proteins.

youdao