在此研究中，纽约大学医学院的科研人员将无毒的基因修饰病毒注入帕金森病人的脑内。

For the study scientists at the New York University School of Medicine injected the brains of Parkinson's patients with a harmless virus which was genetically modified.

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当研究人员试验用FIV感染基因修饰小猫的血细胞时，病毒不能够正常复制。

When the researchers tried to infect blood cells from the genetically modified kittens with FIV, the virus didn't replicate well.

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生物体可以通过基因修饰而抵抗疫苗，这样轻微的疾病就能演变成致死性疾病，皮肤划痕就能产生致命病毒和细菌。

Organisms could be genetically manipulated to defeat vaccines, mild diseases could be turned into deadly ones and lethal viruses and bacteria might be created from scratch.

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