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题库 / OG2017V-CR-139
Conventional wisdom suggests vaccinating elderly people first in flu season, because they are at greatest risk of dying if they contract the virus. This year's flu virus poses particular risk to elderly people and almost none at all to younger people, particularly children. Nevertheless, health professionals are recommending vaccinating children first against the virus rather than elderly people.
Which of the following, if true, provides the strongest reason for the health professionals' recommendation?
Children are vulnerable to dangerous infections when their immune systems are severely weakened by other diseases.
Children are particularly unconcerned with hygiene and therefore are the group most responsible for spreading the flu virus to others.
The vaccinations received last year will confer no immunity to this year's flu virus.
Children who catch one strain of the flu virus and then recover are likely to develop immunity to at least some strains with which they have not yet come in contact.
Children are no more likely than adults to have immunity to a particular flu virus if they have never lived through a previous epidemic of the same virus.
在DE纠结，还是错选E。求解答
这是一道加强题，又是果因推理。已知结果是『先给儿童打疫苗』 已知条件是『病毒对成年人威胁最大』，所以这里有个logic gap，你要找到『给儿童打疫苗』和『预防成年人得病』之间的联系。 C选项，『儿童应对病毒传播负主要责任』，完美的弥补了这个漏洞。
D选项，『儿童得病会产生抗体』，条件说，该病毒本来对儿童效果就不大，且不能解释为什么要优先给儿童打。
E选项，『儿童没有这类抗体』，条件说，儿童不常因这类病毒致病，该选项同样也不能就是为什么要优先给儿童打。
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