问答题

The last paragraph suggests that
A．manufacturing improvements can eliminate the vaccine shortage today.
B．community interventions can prevent the spread of epidemics today.
C．the 1957 influenza would become more wide-spreading today.
D．it is sure that today's medical system can handle the extra load.

A.manufacturing
B.
B．community
C.
C．the
D.
D．it
E.

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