I would request the experts to please explain this toughie...
Regards,
Phil
Influenza virus
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Phirozz
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Each year's vaccination will protect only against the strain of the influenza virus deemed most likely to be prevalent that year, so every year it will be necessary for all high risk individuals to receive a vaccine for a different strain of the virus.avenus wrote:A new government policy has been developed to avoid many serious cases of influenza. This goal will be accomplished by the annual vaccination of high-risk individuals: everyone 65 and older as well as anyone with a chronic disease that might cause them to experience complications from the influenza virus. Each year's vaccination will protect only against the strain of the influenza virus deemed most likely to be prevalent that year, so every year it will be necessary for all high risk individuals to receive a vaccine for a different strain of the virus.
Which one of the following is an assumption that would allow the conclusion above to be properly drawn?
(A) The number of individuals in the high-risk group for influenza will not significantly change from year to year.
(B) The likelihood that a serious influenza epidemic will occur varies from year to year.
(C) No vaccine for the influenza virus protects against more than one strain of that virus.
(D) Each year the strain of influenza virus deemed most likely to be prevalent will be one that had not previously been deemed most likely to be prevalent.
(E) Each year's vaccine will have fewer side effects than the vaccine of the previous year since the technology for making vaccines will constantly improve
Why is it necessary to receive vaccine every year, because a new strain of influenza virus likely to accur every year. This is what the assumption mentioned in ption D.
option C) No vaccine for the influenza virus protects against more than one strain of that virus. Has it anything to do with conclusion ie vaccine is needed every year ??? Answer is obviously NO, so its not the assumption.
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kstv
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A) The number of individuals in the high-risk group for influenza will not significantly change from year to year.
Nothing to suggest the population of high risk is stable.
(B) The likelihood that a serious influenza epidemic will occur varies from year to year.
Then vaccination would be undertaken seeing the virulence of the strain.
(C) No vaccine for the influenza virus protects against more than one strain of that virus.
Premise cannot be a fact.
(D) Each year the strain of influenza virus deemed most likely to be prevalent will be one that had not previously been deemed most likely to be prevalent.
If it was not, the vaccine of last year must have helped to strengthen the resistence to the particular strain.
(E) Each year's vaccine will have fewer side effects than the vaccine of the previous year since the technology for making vaccines will constantly improve
Out of scope.
IMO D.
Nothing to suggest the population of high risk is stable.
(B) The likelihood that a serious influenza epidemic will occur varies from year to year.
Then vaccination would be undertaken seeing the virulence of the strain.
(C) No vaccine for the influenza virus protects against more than one strain of that virus.
Premise cannot be a fact.
(D) Each year the strain of influenza virus deemed most likely to be prevalent will be one that had not previously been deemed most likely to be prevalent.
If it was not, the vaccine of last year must have helped to strengthen the resistence to the particular strain.
(E) Each year's vaccine will have fewer side effects than the vaccine of the previous year since the technology for making vaccines will constantly improve
Out of scope.
IMO D.
