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How effective was Jonas Salks initial testing of the polio vaccine?

Answer:
Jonas Salk's initial testing of polio vaccine is 60 - 70% effective against PV1 (poliovirus type 1, over 90% effective against PV2 and PV3, and 94% effective against the development of bulbar polio.
First answer by ID1062735354. Last edit by ID1062735354. Question popularity: 2 [recommend question].

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