VOA慢速英语2011.12.22
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A number of vaccines remain under development. Most contain genetically engineered versions of a few proteins from the Plasmodium parasite. Plasmodium is the organism that causes malaria. Those modified proteins are designed to get the body's defenses to launch an immune response against the Plasmodium. But the parasite contains thousands of proteins.
大量疫苗仍在研发阶段，其中多数包含许多疟原虫蛋白质的转基因版本。疟原虫是导致疟疾的生物体。这些改良过的蛋白质的作用是让人体免疫系统对疟原虫做出免疫反应。但这种寄生虫包含数千种蛋白质。
Another experimental vaccine includes a deactivated version of the entire parasite. Robert Seder is a researcher at the National Institute of Allergy and Infectious Diseases, near Washington.
另一个实验中的疫苗含有去活化的整个寄生虫。Robert Seder是国家过敏与感染疾病研究所的研究员，研究所在华盛顿附近。
注释：
Malaria 疟疾，瘴气
spray 喷射，喷洒
parasite 寄生虫，食客
Plasmodium 疟原虫，变形体
deactivate v. 使失效；去活化；释放
**** Hidden Message ***** Malaria control eforts currently depends on things like chemically treated ? and spraying against ?, but scientists keep tryinh to find other ways to prevent disease
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