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2025-07-16 18:17 本頁面
【文章內(nèi)容簡介】 almost five hundred thousand by two thousand and twelve.The United Nations program on AIDS requested the study，led by Indian economist Chakravarthi report says three main groups are driving the spread of AIDS in group is injection drug users who share needles.The study found that AIDS is the most likely cause of death and lost work days for people in Asia between the ages of fifteen and forty173。 report says prevention programs can be effective if governments invest at least thirty cents a year per person.For more than twenty years，scientists have been trying to develop a vaccine(疫苗)to prevent H． latest failures came last stopped two studies of an experimental AIDS vaccine from the drug pany results showed that the vaccine failed to protect people and it appeared to put some people at a higher risk of infection.Last Tuesday，several hundred researchers and activists met in Bethesda，Maryland，for a Summit(峰會)on H． Research and debated what to do of the scientists agreed that experimental vaccines should continue to be tested on many said there should be less dependence on human trials(試驗(yàn))．Anthony Fauci is the head of the National Institute of Allergy and Infectious Diseases，which called the said there should be more tests on animals，to add to discoveries from human studies.21．Some studies of an experimental AIDS vaccine were stopped because________.A．the researchers had found out another vaccine to prevent H．B．the drug pany Merck gave up the experiment on AIDS vaccineC．the researchers didn’t get the financial help from governmentD．the vaccine can’t prevent H． and even make people get infected解析：選D。細(xì)節(jié)理解題。由第四段“Early results showed that the vaccine failed to protect people and it appeared to put some people at a higher risk of infection.”可知停止疫苗研究的原因是以前研制
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