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?

Answer Choices

Correct answer marked below

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.

Correct

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.

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What this question tests

What it tests

Whether you can identify the option that most bolsters an argument's conclusion.

Common trap

Choosing an option that is consistent with the argument but adds no new support, or that shifts the topic.