单词：
单词： 相关文章
Millions More Children to Receive Vaccines More than one million children die each year from severe diarrhea and pneumococcal disease. Today (Tuesday), the GAVI Alliance announced an expanded campaign against the two leading killers of children world
VOA标准英语2011年(九月)
By Paula Wolfson Washington 25 December 2006 U.S. President George Bush heads to his Texas ranch Tuesday for a week-long holiday break. But as VOA's Paula Wolfson reports from Washington, it will be very much a working vacation. President Bush is ex
2006年VOA标准英语（十二月）
By Challiss McDonough Cairo 24 April 2006 Image taken from Egypt TV shows some of damage caused by blasts which rocked Egyptian resort town of Dahab, April 24, 2006 Three bombs have rocked the Egyptia
2006年VOA标准英语（四月）
If you could take a vaccine that would protect you against cancer, wouldn't you take it? Well, for cervical cancer, there is a vaccine. It protects against a virus called HPV, which can lead to cancer of the cervix. But a new study reports that many
VOA标准英语2010年(十一)月
US Scientists Expand Scope of HIV Vaccine Study The worlds largest ongoing HIV vaccine study has been expanded to consider multiple ways a vaccine might boost immune response to the AIDS virus. The U.S. Institute of Allergy and Infectious Diseases (N
VOA标准英语2011年(八月)
By Jessica Berman Washington 11 May 2006 French researchers at the Sanofi Pasteur Institute say they have developed a bird flu vaccine that, so far, appears to be safe and effective in humans. But obs
2006年VOA标准英语（五月）