单项选择题
Asking all healthy adults to get a flu shot may result in a shortage of the flu shots for those who are most vulnerable to the infection.
A． Right
B． Wrong
C． Not mentioned
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单项选择题
Those who get the flu vaccine are surely protected from the disease.
A． Right
B． Wrong
C． Not mentioned
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单项选择题
None of the five people killed by inhalational anthrax had been vaccinated against influenza.
A． Right
B． Wrong
C． Not mentioned
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