In the early 1950's dr Jonas Salk developed an effective vaccine for what childhood disease A) polio B)Measles C)chicken pox D)typhoid fever

asked Mar 16, 2018 120k views

1 vote

In the early 1950's dr Jonas Salk developed an effective vaccine for what childhood disease

A) polio
B)Measles
C)chicken pox
D)typhoid fever

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2 votes

A) Polio. But you can also choose D if you don't think A is correct.

Krizz answered Mar 19, 2018

by Krizz

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2 votes

In the early 1950s Dr. Jonas Salk developed a vaccine for A) polio

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