All four dengue virus (DENV) serotypes were permanently in circulation, though the predominant serotype has alternated between DENV-3 and DENV-2 since 2000.
尽管2000年之后主导血清型在DENV - 3和DENV - 2之间交替，但是全部四种登革热病毒血清型一直在循环着。
All four dengue virus (DENV) serotypes were permanently in circulation, though the predominant serotype has alternated between DENV-3 and DENV-2 since 2000.
尽管2000年之后主导血清型在DENV - 3和DENV - 2之间交替，但是全部四种登革热病毒血清型一直在循环着。
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