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May 8, 1980Reputable sourceWell documented

Smallpox is eradicated

On the timeline · around May 8, 1980 · Smallpox is eradicated1965197019751980198519901995

What happened

The World Health Assembly declared smallpox eradicated — the first and still only human disease wiped out, after a global vaccination campaign.

Why it matters

The single greatest achievement of public health: a killer of ~300 million in the 20th century, gone.

Sources