登革热

例句：

1. 1. He caught the dengue fever last week and has been in bed ever since.
   他上周得了登革热，从那以后就一直躺在床上。
2. 2. The outbreak of dengue fever has caused widespread concern among the public.
   登革热的爆发引起了公众的广泛关注。
3. 3. Doctors are trying to find a cure for dengue fever, but so far there is no known effective treatment.
   医生们正在尝试找到登革热的治疗方法，但到目前为止还没有已知的有效治疗方法。