Seudónimo Seudónimo
  • 30-09-2016
  • History
contestada

Dr. Salk found a vaccine to prevent:

small pox
yellow fever
polio
tuberculosis

Respuesta :

Anjaelahoward
Anjaelahoward Anjaelahoward
  • 30-09-2016
Polio. I just looked it up, 

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