Alexander Fleming — "Some people have been very enthusiastic about penicillin, others less so."
Some people have been very enthusiastic about penicillin, others less so.
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More from Alexander Fleming
"It is not difficult to make microbes resistant to penicillin in the laboratory by exposing them to concentrations not sufficient to kill them."
"It is not an exaggeration to say that the discovery of penicillin has saved millions of lives."
"Penicillin cures, but wine makes people happy."
"My greatest satisfaction comes from knowing that my work has saved countless lives."
"I found penicillin and have given it free for the benefit of humanity. Why should it become a profit-making monopoly of manufacturers in another country?"
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Understanding this quote
What it means
Fleming uses classic British understatement to acknowledge that penicillin divided opinion. Rather than proclaiming his discovery universally celebrated, he quietly admits some embraced it while others remained skeptical or indifferent. The remark signals intellectual humility — he refuses to oversell even his most consequential work. It captures how genuinely transformative innovations rarely arrive to unanimous applause; resistance, doubt, and institutional inertia greet even the most life-saving breakthroughs.
Relevance to Alexander Fleming
Fleming discovered penicillin in 1928 almost by accident — a contaminated petri dish at St. Mary's Hospital, London revealed that Penicillium mold killed surrounding bacteria. Despite sharing the 1945 Nobel Prize in Physiology or Medicine, he consistently deflected credit, often noting that Florey and Chain deserved equal recognition for developing it clinically. This characteristic modesty pervades the quote: the man who changed medicine forever describes the world's reaction with deliberate understatement.
The era
Fleming made his discovery in 1928, but penicillin only became widely available during World War II, when mass production by American pharmaceutical companies saved thousands of Allied soldiers from infected wounds. Early resistance came from skeptical physicians unaccustomed to antibiotic treatment and from logistical challenges in large-scale production. By the late 1940s, penicillin had transformed medicine, yet Fleming's remark reflects the genuine friction that greeted even this miraculous intervention during its earliest years.
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