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select the statement that best explains why there has been a resurgence in the number of whooping cough cases in the United stated today.

Select the statement that best explains why there has been a resurgence in the number of whooping cough cases in the United S
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Answer #1

Vaccination-induced immunity decreases over time.

The use of the vaccine started somehwere in 1940s. however, the same vaccine is not that efficient in current circumstances.

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