这种形式的艾滋病发现于西非，但没有传播到世界其他地区。

This form of AIDS is found in West Africa, but has not spread much beyond that part of the world.

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由于这个原因，有一些测试可以发现血液中是否含有引起艾滋病和其他疾病的病毒。

For this reason, there are tests to find out if blood contains viruses that cause AIDS and other diseases.

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但这个令人感到沮丧的发现对人类的艾滋病研究却有着潜在的重大意义。

But this gloomy discovery also carries huge potential significance for AIDS research in humans.

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