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AIDS is one of the most fatal and rampant diseases that deprives of hundreds of thousands of lives each year all over the world, and the condition in African countries is much worse for lack of medicine, education as well as preventive measures. Scientists and researchers have never ceased their efforts to halt the wide spreading tendency of this infecting disease, unfortunately, till now, they have not invented any effective vaccine. Last week, an experimental AIDS vaccine tested in Thailand on some 2,500 drug users failed to protect them from becoming infected with HIV, declared VaxGen Inc., the vaccine’s developer. The pool results were widely expected since VaxGen Inc. had said earlier that its vaccine did not work in a larger North American study.
Most AIDS researchers agree that vaccines will be the only effective way to control a virus that has killed 28 million people and infected 42 million more worldwide.
Two dozen other vacci
A. It is incurable.
B. The international public health community has not done enough to control the disease.
C. Vaxgen's vaccine is more effective than others.
D. It is still hopeful to cure AIDS.
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