在线词典,在线翻译

疫苗如何培育的?

所属:听力板块 来源:普特英语听力 阅读:2207 次 评论:0 条 [我要评论]  [+我要收藏]

小编摘要:疫苗生产商打碎蛋壳,把病毒注入蛋黄周围的蛋清里边。然后他们再把鸡蛋密封起来,这样鸡胚就被感染了,病毒就可以上万亿次的繁殖。他们使用鸡蛋培育疫苗是因为鸡胚很容易被感染而且还很便宜

 Save the Eggs



Vaccine makers crack the eggshell and inject the virus into the white stuff surrounding the yolk. Then they reseal the egg, the embryo becomes infected, and the virus is allowed to copy itself trillions of times over. And they use eggs because eggs are easy to infect and are relatively cheap. Right?

M: Well,yeah,But...

W: But the problem with using eggs to make flu vaccines is that normally there are plenty of eggs to go around, but when there’s a sudden outbreak the eggs can run out pretty fast. And that’s one of the reasons why researchers are experimenting with a new way to grow flu vaccines.

Instead of infecting eggs, they’re trying to grow flu viruses in cultured human and animal cells. When an epidemic occurs, doctors could simply grow a large colony of cells, and then more easily develop enough vaccine.

And this method may not only save time, but also potentially produce more effective vaccines. Since the vaccine grown in cells may be better than caccine grown in the eggs at mimicking the flu virus that infects people.

疫苗生产商打碎蛋壳,把病毒注入蛋黄周围的蛋清里边。然后他们再把鸡蛋密封起来,这样鸡胚就被感染了,病毒就可以上万亿次的繁殖。他们使用鸡蛋培育疫苗是因为鸡胚很容易被感染而且还很便宜,是吧?

是的,但是...

使用鸡蛋培育流感疫苗的问题是,正常来说要有很多鸡蛋才行,但假如疾病突然发生,鸡蛋很快就会用完。那也是为什么研究员们正尝试培育流感疫苗新方法的原因之一。

他们正试图在人类和动物细胞里培育流感疫苗,而不是去感染鸡蛋。当传染病发生时,医生可以仅仅是培育一大群细胞,然后很轻易地生产足够的疫苗。

而且这种方法不仅节约时间,还能尽可能多地生产有效的疫苗,因为细胞里生长的疫苗在仿制流感病毒方面要比鸡蛋里的好。

标签:听力文摘
1
2011-12-02 22:37 编辑:pliny
分享到:
关注海词微博:
发表评论:
表达一些您的想法吧!已有0条评论>>
登录,再发表评论
文明上网,理性发言!
您可能还感兴趣的文章:
  • [听力板块]利刃特别在何处

    大家都知道锋利的刀刃的切割性能胜过钝刀,但您知道确切原因吗?刀刃的作用就是把人们用在刀把上的力集中起来。
  • [听力板块]岩石怎么会出现在你的花园?

    我好奇有多少人在刚刚过去的春天修整了花园,准备大干一场,自以为去年早已清理干净了所有石块。看看花园角落里那一大堆战利品!现在所有石块肯定都被清理出来了。
>>精华推荐阅读
热门评论文章