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Until now only injectable vaccines against influenza have been availab

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Until now only injectable vaccines against influenza have been availab  [#permalink]

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New post Updated on: 09 Oct 2018, 00:35
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Until now only injectable vaccines against influenza have been available. They have been primarily used by older adults who are at risk for complications from influenza. A new vaccine administered in a nasal spray form has proven effective in preventing influenza in children. Since children are significantly more likely than adults to contract and spread influenza, making the new vaccine widely available for children will greatly reduce the spread of influenza across the population.

Which of the following, if true, most strengthens the argument ?


A. If a person receives both the nasal spray and the injectable vaccine, they do not interfere with each other.

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

C. Government subsidies have kept the injectable vaccines affordable for adults.

D. Of the older adults who contract influenza, relatively few contract it from children with influenza.

E. Many parents would be more inclined to have their children vaccinated against influenza if it did not involve an injection.


"Injectable vaccines" Assumption Question

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Originally posted by anilnandyala on 14 Nov 2010, 01:47.
Last edited by Bunuel on 09 Oct 2018, 00:35, edited 2 times in total.
Renamed the topic and edited the question.
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Re: Until now only injectable vaccines against influenza have been availab  [#permalink]

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New post 15 Nov 2010, 13:03
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Your stimulus says the following:
Until now, only injections of vaccine were available.
These were primarily used by older adults.
Now nasal sprays are available that prevent flu in children.
Children are more likely to contract and spread flu.

Conclusion: If nasal sprays are made available for children, it will greatly reduce the spread of flu across the population.

Does something come to mind when you read this conclusion? What came to my mind was that if children are most likely to contract and spread flu, they should have been given flu injections and that would have prevented spread of flu across the population. Why is it that availability of nasal spray will prevent the spread the flu but injections did not?

Now, I need to strengthen the argument so I should focus on my conclusion and see what will strengthen it the most.
Let's read the options:
1. If a person has already been given an injection, he is immune to flu. Nasal spray on top will not help in anyway.
2. This says that nasal sprays work in the same was as do injections. It does not tell me why injections could not prevent the spread of flu while the nasal spray will.
3. This tells us that the subsidies have kept injections affordable for all older adults. But it doesn't say that otherwise their cost is prohibitive. Also, it doesn't say anything about the cost of nasal spray. If this option said, "Injections are very expensive otherwise but nasal spray is a cheap alternative", it might have made a stronger contender. Still, we do not know whether cost is a factor that parents consider at all when getting vaccines for their children. To make this option the answer, we might even have to add something like "Parents are not willing to get their kids immunized if the vaccine is very expensive"
4. Few older adults catch flu from children doesn't strengthen my conclusion that making nasal sprays available for children will reduce the spread of flu across the population.
5. Now that is what I was looking for! A reason why parents don't give flu shots to their kids but will be willing to give nasal sprays. Parents don't like to give shots to their kids (could be because of pain associated with a shot or whatever) Now, with the availability of the nasal spray, they will be more inclined to have their kids vaccinated. This probably will help in preventing the spread of flu across the population.
Answer (E).
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Re: Until now only injectable vaccines against influenza have been availab  [#permalink]

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New post 01 Mar 2013, 14:19
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Rock750 wrote:
Until now only injectable vaccines against influenza have been available. They have been primarily used by older adults who are at risk for complications from influenza. A new vaccine administered in a nasal spray form has proven effective in preventing influenza in children. Since children are significantly more likely than adults to contract and spread influenza, making the new vaccine widely available for children will greatly reduce the spread of influenza across the population.

Which of the following, if true, most strengthens the argument ?

A. If a person receives both the nasal spray and the injectable vaccine, they do not interfere with each other.
B. The new vaccine uses the same mechanism to ward off influenza as injectable vaccines do.
C. Government subsidies have kept the injectable vaccines affordable for adults.
D. Of the older adults who contract influenza, relatively few contract it from children with influenza.
E. Many parents would be more inclined to have their children vaccinated against influenza if it did not involve an injection.



Hi Rock750,

Conclusion: making the new vaccine widely available for children will greatly reduce the spread of influenza across the population.

D. Of the older adults who contract influenza, relatively few contract it from children with influenza.

This choice will have no effect on the conclusion. If we make the vaccine widely available then it will not reduce the spread of influenza across the population because, as per D, older adults do not contract influenza from children. Making the new vaccine widely available does not imply that the children will be willing to take the vaccine

E. Many parents would be more inclined to have their children vaccinated against influenza if it did not involve an injection.

This choice does in face strengthens the conclusion. If parents are more inclined to have their children vaccinated then a larger number of children will be protected from influenza, thus, making the vaccine widely available will reduce the spread of influenza.

This answer choice takes its form from an assumption that is required for the conclusion to be true.

Assumption: Children will be willing (or parents inclined) to take the the influenza medicine in the newly administrated form. Negating this will make the conclusion to fall apart.


Hope this helps,

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Re: Until now only injectable vaccines against influenza have been availab  [#permalink]

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New post 09 Jan 2017, 20:26
Isn't D a kind of assumption here ?
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Re: Until now only injectable vaccines against influenza have been availab  [#permalink]

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New post 10 Jan 2017, 03:02
ankujgupta wrote:
Isn't D a kind of assumption here ?


Note that the question is between nasal sprays and injections. Injections were available but why is it that availability of nasal sprays will bring about a change in the situation?
(D) Few older adults catch flu from children

Few means hardly any. If anything, it is against our conclusion "If nasal sprays are made available for children, it will greatly reduce the spread of flu across the population."
Why will nasal spray made available to children reduce flu across the population?
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Re: Until now only injectable vaccines against influenza have been availab  [#permalink]

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New post 09 Oct 2018, 00:36
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Until now only injectable vaccines against influenza have been availab &nbs [#permalink] 09 Oct 2018, 00:36
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