Eradication requires reaching children in the few areas where the virus still circulates and vaccinating all children under the age of 5.
根除需要在该病毒仍然传播的少数地区接触到儿童和预防接种所有5岁以下儿童。
Global eradication of a virus in a world of more than 6 billion people is not an easy job.
在人口超过60亿的世界中，要在全球根除一种病毒不是一件容易的事。
Eradication will not be easy because the virus stays in these 'reservoirs' and is not affected by the immune response, even after 10 years of antiretroviral treatment.
由于病毒存在于“宿主”中，不受免疫反应的影响，根除并不容易，即使在经历了十年抗逆转录病毒治疗之后也是如此。
Certain species of mosquitos are the reservoir of yellow fever virus; thus eradication of yellow fever is not feasible. This viral presence sometimes amplifies into regular epidemics.
某些种属的蚊子是黄热病病毒的贮主，因此根除黄热病并不可行。病毒活动有时增强，导致流行爆发。
Certain species of mosquitos are the reservoir of yellow fever virus; thus eradication of yellow fever is not feasible.
某些种属的蚊子是黄热病病毒的贮主，因此根除黄热病并不可行。
Certain species of mosquitos are the reservoir of yellow fever virus; thus eradication of yellow fever is not feasible.
某些种属的蚊子是黄热病病毒的贮主，因此根除黄热病并不可行。
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