ordenar
a.- /Invention/the/of/before/vaccines/illness/ killed/had/ people/millions/of/
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b.- /diseases/many/been/eradicated/have/yet/not/
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a.- /Invention/the/of/before/vaccines/illness/ killed/had/ people/millions/of/
______________________________________________________________
b.- /diseases/many/been/eradicated/have/yet/not/
_________________________________________________________
Respuesta:
Invention of vaccines before the illness had killed millions of people
Many diseases have not been eradicated yet