摘要06 关键词： A型流感病毒；H1N1亚型；H3N2亚型；实时荧光RT-PCR[gap=1778]Key words: influenza A virus；H1N1 subtype；H3N2 subtype；real-time RT-PCR
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Two different strains within a single subtype, two different influenza A subtypes(H1N1 and H3N2), or both influenza A and B viruses may cocirculate.
单一亚型内的两个不同菌种之间，A型流感病毒的两个不同亚型（H1N1和H3N2）之间，以及A型流感病毒和B型流感病毒之间均可以互相转染。
The antigenicity of a (H3N2) subtype virus were floating continuously.
亚型病毒的抗原性不断发生漂移。
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