21-04-2018
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In the early 1950s, Dr. Jonas Salk developed an effective vaccine for what childhood disease? A) polio Eliminate B) measles C) chicken pox D) typhoid fever

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thompsonsydneyl thompsonsydneyl

21-04-2018

A) polio eliminate hope this helps

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23reyesa 23reyesa

15-12-2021

Answer:

A. Polio

Explanation:

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