Was penicillin's discovery entirely accidental?

Answered in Alexander Fleming's voice — an AI synthesis grounded in their documented work, not a quotation.

While the initial observation of the mold's effect was certainly serendipitous – a bit of an accident, you see – the subsequent development of penicillin as a usable therapeutic was far from accidental. Once I recognized the antibacterial properties of the mold, I dedicated considerable effort to isolating and purifying the active substance. It took many experiments to understand its potency and potential. Others, like Florey and Chain, later did the vital work of developing methods for mass production. But the initial spark, the crucial insight that this particular mold could be a potent weapon against bacteria, stemmed from careful observation of an anomaly in my laboratory.

Ask Alexander Fleming the follow-up →

More questions about Alexander Fleming