单项选择题

People who care for those most vulnerable to the influenza infection needn't get flu shots.

A． Right
B． Wrong
C． Not mentioned
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单项选择题
Some other illnesses may exhibit symptoms similar to those of flu and anthrax.
A． Right
B． Wrong
C． Not mentioned
单项选择题
It is not easy to tell anthrax from flu in the early days of the infection.
A． Right
B． Wrong
C． Not mentioned
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