GWD1-40

ruud

Until now, only injectable vaccines against influenza have been available.  Parents are reluctant to subject children to the pain of injections, but adults, who are at risk of serious complications from influenza, are commonly vaccinated.  A new influenza vaccine, administered painlessly in a nasal spray, is effective for children.  However, since children seldom develop serious complications from influenza, no significant public health benefit would result from widespread vaccination of children using the nasal spray.

Which of the following is an assumption on which the argument depends?

 

A.      Any person who has received the injectable vaccine can safely receive the nasal-spray vaccine as well.

B.       The new vaccine uses the same mechanism to ward off influenza as jnjectable vaccines do.

C.      The injectable vaccine is affordable for all adults.

D.      Adults do not contract influenza primarily from children who have influenza.
        

E.       The nasal spray vaccine is not effective when administered to adults.
        

why the key is d,who can give me the reasoning process,thx

iamwuyan

之前, 只有注射育苗AVAILABLE, 家长怕小孩儿疼, 所以一般不愿意带小孩儿打针, 但是因为成年人得病的可能性大, 所以基本都注射了

现在有一种新的无痛儿童喷雾疗法, 但是由于儿童很少患这个病, 所以这种新疗法不会给公共卫生带来显著的BENEFIT.

问假设

这题感觉可以用排除法排除掉其他选项, 也可以否定D(成年人主要得病都是从儿童身上传染的), 推翻结论