| Home | News| Living in China| MMS | SMS | About us | Contact us|
       
     Language Tips > 2004
    DEVELOPMENT REPORT - Malaria Vaccine
    By Karen Leggett


    This is Robert Cohen with the VOA Special English Development Report.

    Malaria is a very serious disease that kills more children under the age of five than any other disease. People get malaria when they are bitten by tiny insects called mosquitoes. The mosquitoes carry parasites(寄生蟲)which enter a person's blood and cause malaria.

    Carter Dibbs is an American doctor who works on the Malaria Vaccine Development Program for the United States Agency for International Development. Doctor Dibbs says the parasite that causes malaria is much more complex than other organisms, such as the virus that causes polio. He says the malaria parasite uses many tricks so that it is more difficult to make a vaccine(疫苗)that is safe and will prevent the disease.

    Malaria vaccines are now being tested on adults in Burkina Faso and Mali. Vaccines are being tested on children in Mozambique and Mali.

    Many organizations are involved in the testing. They include U.S.A.I.D, the American military, American health organizations, and European governments.

    To make sure that a vaccine will really prevent malaria, it must be tested on many people in many different places. Doctor Dibbs says the people who join the vaccine tests are as important to the goal of finding the right medicine as the scientists.

    People are told about the tests during public meetings with community leaders. Doctor Dibbs says people should ask questions about good or bad things that could happen to their bodies if they take the medicine that is being tested. Adults or parents of children must agree to the vaccine test.

    Adults receive a small amount of the vaccine medicine. The children receive either the malaria vaccine or a different medicine that protects them against a different disease.

    Then health care workers observe the people to see if they show any signs of malaria. The results of the tests must be compared to people who have not received the vaccine.

    The vaccine is successful if fifty percent of the people who receive it do not show any signs of malaria for one year.

    Then the United States government will be asked to approve the vaccine. However, it could still take another five years before a licensed vaccine is ready to give to all the children in Africa and around the world.

    This VOA Special English Development Report was written by Karen Leggett. This is Robert Cohen.

     
    Go to Other Sections
    Story Tools
     
    Copyright by chinadaily.com.cn. All rights reserved

    版權(quán)聲明:未經(jīng)中國日報(bào)網(wǎng)站許可,任何人不得復(fù)制本欄目內(nèi)容。如需轉(zhuǎn)載請與本網(wǎng)站聯(lián)系。
    None of this material may be used for any commercial or public use. Reproduction in whole or in part without permission is prohibited.
     

     

    日韩精品人妻系列无码专区 | 色欲综合久久中文字幕网| 中文字幕丰满乱子伦无码专区| 日无码在线观看| 人妻精品久久无码区 | 亚洲av无码一区二区乱子伦as| 日韩中文字幕免费视频| 日韩A无码AV一区二区三区| 无码人妻精品一区二区三区久久 | 中文字幕在线观看国产| 色婷婷综合久久久久中文一区二区 | 国内精品人妻无码久久久影院 | 国产亚洲AV无码AV男人的天堂| 四虎影视无码永久免费| 一本一道AV无码中文字幕| 亚洲AV无码国产丝袜在线观看| 线中文在线资源 官网| A狠狠久久蜜臀婷色中文网| 亚洲无码黄色网址| 天堂无码在线观看| 国产成人无码精品久久久免费| 无码少妇一区二区三区| 亚洲爆乳无码专区| 亚洲熟妇无码另类久久久| 最新中文字幕av无码专区| 99久久无色码中文字幕人妻| 国产精品 中文字幕 亚洲 欧美| 无码av不卡一区二区三区| 99久久无码一区人妻a黑| 久久午夜无码鲁丝片| 免费A级毛片无码A∨中文字幕下载| 亚洲AV无码乱码国产麻豆穿越| 中文字幕av无码一区二区三区电影| 免费A级毛片无码A∨免费| 亚洲精品色午夜无码专区日韩| 亚洲国产精品无码久久久蜜芽| 中国无码人妻丰满熟妇啪啪软件| 亚洲熟妇无码另类久久久| 无码av最新无码av专区| 国产在线无码不卡影视影院 | 手机在线观看?v无码片|