translation.en: It's an extreme form of dengue fever, a mosquito-born disease which also does not have an effective therapy or a vaccine, and kills 22,000 people each year.
translation.zh: 本例是登革热的极端形式， 这是一种通过蚊子传播的疾病， 它也没有有效的治疗方法或疫苗， 并且每年杀死2.2万人。