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These days? none. The disease was erradicated in 1979 by the World Health Organisation. It exists only in two laboratories - in the CDC in america, and a research centre in Russia.

Back in the day though, the mortality varied depending on the type - about 30% overall

ordinary confluent was fatal 50-75% of the time

ordinary semi-confluent about 25-50% of the time.

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13y ago

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