Gizelle15
Gizelle15 Gizelle15
  • 22-03-2017
  • History
contestada

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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Аноним Аноним
  • 22-03-2017
A) Polio. But you can also choose D if you don't think A is correct.
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KaraWheeler67
KaraWheeler67 KaraWheeler67
  • 22-03-2017
In the early 1950s Dr. Jonas Salk developed a vaccine for A) polio
Answer Link

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