Mexico Smallpox 500 Years

Mexico Smallpox 500 Years

FILE – In this Friday, Aug. 7, 2015 file photo, a worker stands in front of ongoing excavations at the Templo Mayor archeological site, directing people into the adjoining museum in downtown Mexico City, once the Aztec capital of Tenochtitlan. In light of the 2020 COVID-19 pandemic, it remains unclear how much humanity has learned from one of the greatest mass die-offs due to the smallpox epidemic, which gave rise to the first successful vaccine in 1796. (AP Photo/Rebecca Blackwell, File)

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