广播电视英语短句 第 79 课：遭受剧烈头疼-6

Each year an estimated half-million people with dengue hemorrhagic fever require hospital treatment. 每年有 50 万病患因出血性登革热寻求治疗。

The W.H.O. says about two and one-half percent die. 世卫组织称登革热的死亡率为 2.5% 。

But people are more likely to die if they do not get help. 但是如果没有接受任何救助，死亡的可能性就更大。

For now, the W.H.O. says the only way to prevent the spread of dengue fever is to fight the mosquitoes that carry it. 据世卫组织称，目前预防登革热传播的唯一方法是杀灭带毒蚊虫。