A massive public health effort eradicated smallpox but scientists are still studying the deadly virus

The smallpox virus appears to have been with humanity for millennia before a global vaccination drive wiped it out. Current genome research suggests how smallpox spread and where it came from.

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Tags: genome coronavirus genome-sequencing pandemic sars-cov-2 vaccination viruses world-health-organization-who viral-evolution smallpox zoonoses virulence cowpox smallpox-eradication disease-eradication zoonosis viral-dna