During the Cold War era, there was a global effort to vaccinate people against smallpox. What was the lasting effect of this effort?

Smallpox became the first disease that infects humans to be eradicated.

Explanation:

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answer; (d) i believe that the correct answer is americans finally ran out of ammunition;

in 1859, brown and 21 of his followers attacked and occupied the federal arsenal in harper's ferry. their goal was to capture supplies and use them to arm a slave rebellion. brown was captured during the raid and later hanged, but not before becoming an anti-slavery icon. abolitionist and insurrectionist

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