英语阅读练习：轮状病毒疫苗

轮状病毒疫苗是预防轮状病毒肠炎的疫苗，主要接种对象为年龄较小的儿童。轮状病毒感染性腹泻是婴幼儿急诊和死亡(除呼吸道感染之外)的第二位病因，因此，轮状病毒成为全世界科学家们研究的焦点。轮状病毒疫苗是预防轮状病毒感染性腹泻的较经济、较有效的手段。下面小编为大家分享关于轮状病毒疫苗的英语阅读文章。

Researchers in the African country of Niger have introduced a new vaccine that protects against the diarrheal disease called rotavirus.

非洲国家尼日尔的研究人员推出了一种新型疫苗，可以预防轮状病毒腹泻。

A scientific test has shown that the new vaccine is effective, safe and easy to use. Experts believe it will be more widely used than the two rotavirus vaccines now given to children.

科学测试表明这种新型疫苗有效、安全、易用。认为它将会比目前对儿童接种的两种轮状病毒疫苗使用更为广泛。

A killer without a good vaccine 缺乏合适疫苗的杀手

The new vaccine is important because rotavirus is a serious illness that can lead to death. Rotavirus causes a severe infection of the gastro-intestinal tract. It kills more than 215,000 children each year -- about 600 a day.

这种新型疫苗非常重要，因为轮状病毒是一种会导致死亡的严重疾病。轮状病毒会引起胃肠道严重感染。这种病毒每年导致超过21.5万名儿童死亡，大约相当于每天600人。

Two vaccines against rotavirus are already available. However, they are costly and difficult to use.

目前已经有两种针对轮状病毒的疫苗。然而，这两种疫苗价格昂贵并且难以使用。

They must also be kept cold. In many African countries where people suffer from rotavirus, refrigeration and electricity are unreliable.

它们还必须保持低温。在很多感染轮状病毒的非洲国家，制冷和电力并不可靠。

As a result, the existing rotavirus vaccines are not widely used.

因此，现有的轮状病毒疫苗没有得到广泛使用。

A new option 新的选择

Researchers have been working on a new vaccine for rotavirus called BRV-PV. They recently tested the vaccine with young children in Niger.

研究人员一直在研究一种名为BRV-PV的新型轮状病毒疫苗。他们较近对尼日尔的幼儿测试了这种疫苗。

Researchers gave 1,780 babies the BRV-PV vaccine. Only 31 cases of rotavirus developed in those babies.

研究人员为1780名儿童接种了BRV-PV疫苗。在这些幼儿中只有31人感染了轮状病毒。

In contrast, 87 cases of rotavirus developed among the babies who received a treatment but did not get the real medicine. In other words, those babies were given a placebo.

相比之下，在接受诊治但没有接种真正疫苗的幼儿之中，有87人感染了轮状病毒。换句话说，这些幼儿被使用了安慰剂。

The researchers say the clinical trial shows that BRV-PV was nearly 67 percent effective.

研究人员表示，这次临床试验表明BRV-PV疫苗的有效率接近67%。

The study was published in The New England Journal of Medicine.

这项研究发表在《新英格兰医学杂志》上。

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