每年估计有500,000出血性登革热患者需要医院治疗。
Each year an estimated 500,000 people with dengue hemorrhagic fever require hospital treatment.
使老鼠感染登革热，通过这一过程，科研人员就可以研究登革热的传播特点，并探究究竟是哪些因素导致了较为严重，通常会致人死命的出血性登革热。
By infecting the mice with strains of the dengue virus, investigators can study how the disease takes hold and what factors might cause the more serious and often deadly dengue hemorrhagic fever.
使老鼠感染登革热，通过这一过程，科研人员就可以研究登革热的传播特点，并探究究竟是哪些因素导致了较为严重，通常会致人死命的出血性登革热。
By infecting the mice with strains of the dengue virus, investigators can study how the disease takes hold and what factors might cause the more serious and often deadly dengue hemorrhagic fever.
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