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  3. H1N1 Epidemic Trends The number of Americans being tested for the swine flu has plummeted, providing more evidence that the

H1N1 Epidemic Trends The number of Americans being tested for the swine flu has plummeted, providing more evidence that the

admin2013-07-08  58
问题                         H1N1 Epidemic Trends
    The number of Americans being tested for the swine flu has plummeted, providing more evidence that the second wave of H1 N1 infections has peaked in the United States, a medical testing company reported Friday.
    Quest Diagnostics Inc. ; the world’s leading diagnostic testing company, reported that an analysis of nearly 170,000 samples from patients between May 11 and Dec. 9 showed the number of tests declined 75 percent since hitting a peak in the middle of October.
    At the same time, the proportion of tests that are coming back positive for H1N1 has fallen, from 44 percent in November to only 21 percent for the two weeks ending Dec. 9. The new H1N1 virus continues to be the dominant virus causing influenza, the company reported. It said H1N1 accounts for 98 percent of positive flu samples.
    Positive tests have fallen for all age groups, but children age 5 to 14 continue to experience the highest percentage of H1N1 positive test results, Quest said. Nearly four in 10 children tested as recently as last week were positive for the virus, the company said. By comparison, nearly 80 percent of children in this age group tested positive in late October.
    "Our data are a welcome indication that H1N1 may not be the health threat during the holidays that it has been throughout the fall," said Jay M. Lieberman, the company’s medical director for infectious diseases.
    "Nonetheless, this is no time for people to be complacent about protecting themselves and their families from HIN1 infection," he said. " The 2009 HIN1 influenza virus continues to be far and away the most significant source of influenza in every region of the US, according to our data. Many millions of people remain susceptible to the virus, which continues to cause serious disease in some individuals. In addition, the prospect of a third wave of virus activity next year means it is far too soon to declare victory over H1N1." The company’s findings mirror reports from the federal Centers for Disease Control and Prevention, which has found a significant drop in flu cases around the country.
    Federal health officials, however, are urging people to continue to get vaccinated against the disease. After an initial shortage of vaccine that prompted health officials to limit the vaccine to children, pregnant women and other people at high risk from the virus, most states are now making the vaccine available to anyone who wants it.
The battle against H1N1______.
选项 A、has entered the third phase
B、has come to an end
C、should be carried forward
D、has suffered from heavy loss
答案C
解析 推理判断题。根据题干关键词the battle against H1N1定位到第六、七段。第六段提出数据表明，甲流病毒可能不会像秋季那样对圣诞假期构成健康威胁，但甲流病毒无疑仍是最重要的流感病原。第七段第二句指出数百万人仍易受这种病毒感染．并会在一些人身上引发严重的疾病，故[C]符合题干要求，为正确选项。第三句中预计明年还将出现病毒的第三波大流行，也就是说宣布已经战胜了甲流病毒还为时过早，故[A]、[B]排除；[D]“造成了严重的损失”在原文中没有支撑的细节，故排除。
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