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Until now, only injectable vaccines against influenza have been available

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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 injectable 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 mot effective when administered to adults.

Official Answer

1 Answer

flamingo
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Conclusion: no significant public health benefit would result from widespread vaccination of children using the nasal spray.

Reasoning: A correct answer choice for assumption is a defender or supporter. If it's a supporter, conclusion + "only if" + answer choice makes sense. Also, the conclusion is necessarily committed to one of the answer choices below. Why would there be no significant public health benefit should children be administered the nasal spray?

A. Any person who has received the injectable vaccine can safely receive the nasal spray vaccine as well. Wrong - This is indeed an assumption, but not one that the conclusion is committed to.

B. The new vaccine uses the same mechanism to ward off influenza as injectable vaccines do. Wrong - shell game. New mechanisms or not, this is not what the conclusion is committed to.

C. The injectable vaccine is affordable for all adults. Wrong - The conclusion is not committed to this assumption.

D. Adults do not contract influenza primarily from children who have influenza. Correct - The conclusion is committed to this assumption because both adults and children are actors, and it follows the premise + conclusion.

E. The nasal spray vaccine is mot effective when administered to adults. Wrong - Out of scope.

answered Jun 27, 2014 by Guru (5,599 points)
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