求翻译：疟疾每年在全球感染数以百万计的儿童，现在人类终于有了一种对抗它的利器——第一种针对疟疾的疫苗今年已经在撒哈拉以南地区的儿童中试验成功。结果显示这种新型疫苗能将疟疾感染率降低一半左右，考虑到这是人类开发的第一种此类疫苗，这一成果已经相当不易。是什么意思？

Malaria each year in the the global infections millions of children, and now humanity finally had a confrontation weapon this year - the first vaccine against malaria has been successfully tested in children in sub-Saharan. The results show that this new type of vaccine malaria infection rates can b

Malaria infection in the world each year to 1 million of children, human beings are now finally have a weapon in a combat it - the first for the malaria vaccine this year has been in the sub-Saharan region in the children tested successfully. Results showed that this new vaccine to reduce the malari

Malaria every year infects the child in the whole world who million counts, now the humanity finally had one kind to resist its sharp weapon - - first kind already in the local child to experiment this year in view of malaria vaccine south of Sahara's successfully.The result showed this kind of new

Malaria annually in the world's millions of infected children, humans now finally have a weapon against it-this year-the first vaccine against malaria has been successfully tested in the Sub-Saharan region of children. Results showed that this new vaccine will halve the rate of malaria infection aro

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