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One particular important factor was a scientific being familiar with about the virus itself. Virologists had come to believe that variola could survive and replicate only inside of human beings. Several viruses that result in disorder in humans could also infect animals — think of Jenner’s cowpox. But variola experienced https://fyyuqli.dgbloggers.com/26546891/manual-article-review-is-required-for-this-article

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