Towards the middle of the Seventeenth century, doctors attempt the first blood transfusion between animals. But nobody dares to even pass to the man. It is still too early, too risky, there is too many unknown factors. Try a transfusion could endanger the recipient. The English, who first described the circulation of blood a few years ago, are reluctant to take the plunge. In France, the new Academy of sciences refuses to allow its members to take part in the adventure. Yet, a man, a Frenchman, dare to spill blood on June 15, but that of a lamb…

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