【GWD Q40】求助

ldn005402

GWD1-Q40:

Until mow, only injectable vaccinesagainst influenza have been available. Parents are reluctant to subject children to the pain of injections, butadults, who are at risk of serious complications from influenza, are commonlyvaccinated.  A new influenza vaccine,administered painlessly in a nasal spray, is effective for children.  However, since children seldom developserious complications from influenza, no significant public health benefitwould result from widespread vaccination of children using the nasal spray.

Which of the following is anassumption on which the argument depends?

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

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

C.   The injectable vaccine is affordable for alladults.

D.   Adults do not contract influenza primarilyfrom children who have influenza.

E.    The nasal spray vaccine is mot effectivewhen administered to adults.

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答案上分析的是：

题干分析：

P：目前，只有可以注射的预防流感的疫苗，但是家长往往不愿意让小孩遭受注射疫苗的痛苦。现在有一种新的可以喷的疫苗。但是流感带来的很严重的综合症往往只发生在大人身上，小孩很少会很严重。

C：所以让小孩广泛的使用喷射的疫苗没有什么明显的收益。

Assumption：小孩自己不会有综合症就不会传染给大人让大人得综合症。

我觉得assumption跟题目没有联系啊。 自己想的是：得综合征的小孩少了，所以喷的疫苗没有明显受益。如果按照答案的解析来看，也就是说大人得的少了，那岂不是注射的疫苗收益变小？？？
求解释~ Tkx~