An independent advisory group is suggesting that everyone in the United States age fifteen to sixty-five should get tested for HIV. HIV is the infection that causes AIDS.
The US Preventive Services Task Force says wider public acceptance of HIV testing could lead to earlier treatment of cases, and further slow the spread of AIDS. The task force is collecting public comments on its proposed recommendation until December seventeenth.
The sixteen medical experts on the task force are appointed by the government. They examine scientific evidence for and against health care services designed to prevent disease.
Carlos Del Rio is co-director of the Emory Center for AIDS Research in Atlanta, Georgia. He is not a member of the task force, but says early discovery and treatment of HIV is important for two reasons.
"People are less likely to progress to disease and also, as importantly, is people are less likely to transmit to others. So starting therapy early leads to better disease outcomes."
HIV is spread through unprotected sex or contact with an infected person's blood. In two thousand five, the task force recommended testing for all pregnant women and anyone at increased risk of HIV.
Now, says Dr. Del Rio, HIV tests would be offered as an early screening tool. He says that makes more sense than offering it later when people go to the doctor for tests to find out why they are sick.
An estimated 1.2 million Americans have HIV. Each year about fifty thousand more get infected. Up to twenty-five percent of all infected people do not know they have the virus.
But among young people, the Centers for Disease Control and Prevention says about sixty percent do not know it. The CDC says one-fourth of new infections in the United States are in young people age thirteen to twenty-four.
December first is World AIDS Day. The latest United Nations AIDS report says twenty-five low- to middle-income countries have cut their rate of new infections in half since two thousand one. Thirteen of those countries are in sub-Saharan Africa.
But UNAIDS researchers say the number of new cases has risen more than thirty-five percent in the Middle East and North Africa since two thousand one.
一般现在时代替将来时的应用
否定词开头的部分倒装句的情况
指代意义决定谓语的单复数
as, though 引导的倒装句
need/want/require/worth doing sth.
特殊的虚拟语气词:should
祈使句的结构
一般现在时代替过去时
延续动词与瞬间动词的区别
感叹句的结构
部分倒装句的应用
时态与时间状语
不用进行时的动词
谓语动词与前面的主语一致的情况
将来进行时的应用
句子的种类
动词let的用法
与后接名词或代词保持一致的情况
过去进行时的应用
主动形式表示被动意思的情况
wish的用法
并列结构作主语时谓语用复数
一般现在时代替进行时
一般现在时代替完成时
将来完成时的应用
过去完成时的应用
主谓一致的概念
强调句的结构
被动形式表示主动意义
时态一致的语法应用
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