In the recent years, dengue has been documented in travellers returning from several countries in West Africa, and particularly dengue type-3 virus.

近年来，有文件记载，从西非几个国家回国的旅行者感染了登革热，尤其是3型登革热病毒。

youdao

In the recent years, dengue has been documented in travellers returning from several countries in West Africa, and particularly dengue type-3 virus.

近年来，有文件记载，从西非几个国家回国的旅行者感染了登革热，尤其是3型登革热病毒。

youdao