What fatal danger/ problem did mankind face centuries ago,but are no longer a threat today?
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Centuries ago, mankind was ffaced with the fatal problem of viruses. There were viruses of small pox, other plant and rodent viruses.
These were not only affecting a local area and its residents; rather it was wiping out millions and millions of persons all accross geographical locations .
Today, small pox and many other viruses have been eliminated permanently from the world, ensuring longevity .
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