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。
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This photo story documents the unusual challenges the health workers faced in reaching and vaccinating people in remote and resource-poor areas of Mali.
The goal is to work on vaccinating the edge of this area and then move eastward toward the coast in efforts to eliminate the virus, he told Discovery News.