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1 (of 5) Sir Alexander Fleming receives the Nobel Prize from King Gustaf V of Sweden on 10 December 1945. Behind Alexander Fleming stands Nobel Laureate Ernst B. Chain.

Public domain via Wikimedia Commons Photographer unknown

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2 (of 5) Alexander Fleming in the laboratory.

Ministry of Information. Photo: Division Photographer, Public domain, via Wikimedia Commons

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3 (of 5) Alexander Fleming with a culture plate.

Alexander Fleming Laboratory Museum, Imperial College Healthcare NHS Trust

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4 (of 5) Alexander Fleming in 1932.

Alexander Fleming Laboratory Museum, Imperial College Healthcare NHS Trust

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5 (of 5) Alexander Fleming Laboratory Museum.

Alexander Fleming Laboratory Museum, Imperial College Healthcare NHS Trust