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by gus_massa
778 days ago
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When smallpox was eradicated, the WHO organized teams to collect and destroy samples of smallpox used in remote places for variolation. https://en.wikipedia.org/wiki/Variolation#Decline IIRC the samples they found were too old and did not contain viable virus, but they were afraid they could start a new smallpox epidemic. So ... I guess they think virus can survive for a long time. |
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