自2002年发生登革3型病毒主要流行以来，登革3型病毒一直是里约热内卢过去5年中最主要的血清型。 当前，里约热内卢正经历新一轮登革2型病毒流行。

Rio de Janeiro, where DEN-3 has been the predominant circulating serotype for the past 5 years since the major DEN-3 epidemic in 2002, is now experiencing the renewed circulation of DEN-2.

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目的制备登革2型病毒中国分离株(DEN2 - 43)的衣壳蛋白缺失突变病毒。

Objective To generate rescued viruses with deletion mutation of capsid protein from dengue virus type 2 isolated in China (DEN2-43).

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目的分析登革4型病毒（DV4 ）广东株的基因序列，比较其同源性，追查DV4的地理来源。

Objective To analyze the gene sequence of Dengue 4 viruses (DV4) in Guangdong Province, to compare their similarity and explore their sources.

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