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Killing Cancer, part two

Name: Killing Cancer, part two
Uploaded: 2015-03-29T19:58:00-0400
Duration: 12 min 2 s
Description: With the polio trial's early success the team raised the dose in hope of an even better result. But that's when the polio trial encountered its first tragedies. Scott Pelley reports.

With the polio trial's early success the team raised the dose in hope of an even better result. But that's when the polio trial encountered its first tragedies. Scott Pelley reports.