Paris, May 1940. Nazi troops storm the city and at Le Bourget airport, on the last flight out, sits Dr Alexandre Yersin, his gaze politely turned away from his fellow passengers with their jewels sewn into their luggage. He is too old for the combat ahead, and besides he has already saved millions of lives. When he was the brilliant young protA(c)gA(c) of Louis Pasteur, he focused his exceptional mind on a great medical conundrum: in 1894, on a Hong Kong hospital forecourt, he identified and vaccinated against bubonic plague, later named in his honour Yersinia pestis.
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