Experiment: A child is deliberately infected with the deadly smallpox disease without his parents' informed consent. Result: The world's first vaccine. Experime

Winner of the Los Angeles Times Book Prize "A panoramic and perfectly magnificent intellectual history of medicine…This is the book that delivers it all." —

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It takes more than 10 billion years to create just the right conditions on one planet for life to begin. It takes another three billion years of evolving life f

Experiment: A child is deliberately infected with the deadly smallpox disease without his parents' informed consent. Result: The world's first vaccine. Experime