自从25年前正式确定这种疾病以来，对于后天性免疫缺陷综合症仍然没有有效的治疗。

Twenty-five years since it was first identified, there is still no cure for Acquired Immune Deficiency Syndrome.

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之后，一些欧洲人和亚洲人在大约10000年前左右回到了非洲，同时携带了新获得的基因以及强化了的免疫能力。

Some of the Europeans and Asians then went back to Africa around 10, 000 years ago, bringing the newly acquired genes and their associated immunity boost with them.

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败血症性休克常发生在细菌感染后，以机体免疫系统释放出大量的致炎(炎症前)细胞因子为特征。

Septic shock often follows a bacterial infection, and is characterized by the overwhelming release of pro-inflammatory cytokines by the body's immune system.

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